DOC-1119 Add new metrics for snowflake_streaming output (#194)

Author: asimms41

modules/components/pages/outputs/snowflake_streaming.adoc

@@ -150,20 +150,26 @@ This output emits the following metrics.
 |===
 | Metric name | Description
 
+| `snowflake_compressed_output_size_bytes`
+| The size in bytes of each message batch uploaded to Snowflake.
+
 | `snowflake_convert_latency_ns`
 | The time taken to convert messages into the Snowflake column data types.
 
 | `snowflake_serialize_latency_ns`
-| The time taken to serialize the converted columnar data into a file to send to Snowflake.
+| The time taken to serialize the converted columnar data into a file for upload to Snowflake.
 
 | `snowflake_build_output_latency_ns`
-| The time taken to build the output file that is sent to Snowflake. This metric is the sum of `snowflake_convert_latency_ns` + `snowflake_serialize_latency_ns`. 
+| The time taken to build the file that is uploaded to Snowflake. This metric is the sum of `snowflake_convert_latency_ns` + `snowflake_serialize_latency_ns`. 
 
 | `snowflake_upload_latency_ns`
 | The time taken to upload the output file to Snowflake.
 
-| `snowflake_compressed_output_size_bytes`
-| The size in bytes of each message batch sent to Snowflake.
+| `snowflake_register_latency_ns`
+| The time taken to register the uploaded output file with Snowflake.
+
+| `snowflake_commit_latency_ns`
+| The time taken to commit the uploaded data updates to the target Snowflake table.
 
 |===