docs: update terraform exception expire_timestamp and all databases, sync specific databases in one instance (#828)

* update terraform exception expiration_time and all databases

* sync specific databases in an instance

Author: adela-bytebase

mintlify/tutorials/manage-data-masking-with-terraform.mdx

@@ -388,10 +388,17 @@ resource "bytebase_policy" "masking_exception_policy" {
 ```
 
 <Note>
+If there is no `expire_timestamp` specified, the exemption will never expire.
+
 `2027-07-30T16:11:49Z` is an ISO 8601 UTC timestamp.
 Our system uses PostgreSQL to store metadata, where this value is stored as a `timestamptz`.
 </Note>
 
+<Note>
+If you want to apply the exemption to all databases, you can skip the `database`, `table`, and `column` fields.
+</Note>
+
+
 ## Step 7: Apply Final Configuration and Test
 
 Apply the masking exceptions and test everything:

mintlify/tutorials/manage-databases-with-terraform.mdx

@@ -115,6 +115,13 @@ resource "bytebase_instance" "prod" {
 }
 ```
 
+<Note>
+`sync_databases` is a list of database names to sync. By default, all databases are synced.
+
+If you don't want to sync all databases, you can set something like `sync_databases = ["db1", "db2"]`.
+</Note>
+
+
 **Understanding the Configuration**
 
 - **depends_on**: Ensures environments from Part 1 exist first