add MOLT Fetch export retry flags

Author: taroface

src/current/molt/molt-fetch.md

@@ -111,6 +111,8 @@ MOLT Fetch loads the exported data into the target CockroachDB database. The pro
 | `--crdb-pts-refresh-interval`   | The frequency at which the protected timestamp's validity is extended. This interval maintains protection of the data snapshot until data export from a CockroachDB source is completed. For example, if set to `10m`, the protected timestamp's expiration will be extended by the duration specified in `--crdb-pts-duration` (e.g., `24h`) every 10 minutes while export is not complete. <br><br>**Default:** `10m0s`                                                                                                                                                  |
 | `--direct-copy`                 | Enables [direct copy](#direct-copy), which copies data directly from source to target without using an intermediate store.                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
 | `--export-concurrency`          | Number of shards to export at a time per table, each on a dedicated thread. This controls how many shards are created for each individual table during the [data export phase](#data-export-phase) and is distinct from `--table-concurrency`, which controls how many tables are processed simultaneously. The total number of concurrent threads is the product of `--export-concurrency` and `--table-concurrency`. Tables can be sharded with a range-based or stats-based mechanism. For details, refer to [Table sharding](#table-sharding).<br><br>**Default:** `4` |
+| `--export-retry-max-attempts`   | Maximum number of retry attempts for source export queries when connection failures occur. Only supported for PostgreSQL and CockroachDB sources.<br><br>**Default:** `3`                                                                                                                                                                                                                                                                                                                                                                                                  |
+| `--export-retry-max-duration`   | Maximum total duration for retrying source export queries. If `0`, no time limit is enforced. Only supported for PostgreSQL and CockroachDB sources.<br><br>**Default:** `5m0s`                                                                                                                                                                                                                                                                                                                                                                                            |
 | `--filter-path`                 | Path to a JSON file defining row-level filters for the [data import phase](#data-import-phase). Refer to [Selective data movement](#selective-data-movement).                                                                                                                                                                                                                                                                                                                                                                                                              |
 | `--fetch-id`                    | Restart fetch task corresponding to the specified ID. If `--continuation-file-name` or `--continuation-token` are not specified, fetch restarts for all failed tables.                                                                                                                                                                                                                                                                                                                                                                                                     |
 | `--flush-rows`                  | Number of rows before the source data is flushed to intermediate files. **Note:** If `--flush-size` is also specified, the fetch behavior is based on the flag whose criterion is met first.                                                                                                                                                                                                                                                                                                                                                                               |
@@ -123,7 +125,7 @@ MOLT Fetch loads the exported data into the target CockroachDB database. The pro
 | `--local-path-listen-addr`      | Write intermediate files to a [local file server](#local-path) at the specified address (e.g., `'localhost:3000'`). `--local-path` must be specified.                                                                                                                                                                                                                                                                                                                                                                                                                      |
 | `--log-file`                    | Write messages to the specified log filename. If no filename is provided, messages write to `fetch-{datetime}.log`. If `"stdout"` is provided, messages write to `stdout`.                                                                                                                                                                                                                                                                                                                                                                                                 |
 | `--logging`                     | Level at which to log messages (`trace`/`debug`/`info`/`warn`/`error`/`fatal`/`panic`).<br><br>**Default:** `info`                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
-| `--metrics-listen-addr`         | Address of the Prometheus metrics endpoint, which has the path `{address}/metrics`. For details on important metrics to monitor, refer to [Monitoring](#monitoring).<br><br>**Default:** `'127.0.0.1:3030'`                                                                                                                                                                                                                                                                                                                                 |
+| `--metrics-listen-addr`         | Address of the Prometheus metrics endpoint, which has the path `{address}/metrics`. For details on important metrics to monitor, refer to [Monitoring](#monitoring).<br><br>**Default:** `'127.0.0.1:3030'`                                                                                                                                                                                                                                                                                                                                                                |
 | `--mode`                        | Configure the MOLT Fetch behavior: `data-load`, `export-only`, or `import-only`. For details, refer to [Fetch mode](#fetch-mode).<br><br>**Default:** `data-load`                                                                                                                                                                                                                                                                                                                                                                                                          |
 | `--non-interactive`             | Run the fetch task without interactive prompts. This is recommended **only** when running `molt fetch` in an automated process (i.e., a job or continuous integration).                                                                                                                                                                                                                                                                                                                                                                                                    |
 | `--pprof-listen-addr`           | Address of the pprof endpoint.<br><br>**Default:** `'127.0.0.1:3031'`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |