[FLINK-38514][postgres] Add support for UUID array type in PostgreSQL CDC connector

[Hisoka-X]

This close https://issues.apache.org/jira/browse/FLINK-38514

This pull request adds support for mapping PostgreSQL UUID[] array types to Flink's ARRAY<STRING> type in both the source and pipeline connectors. It updates type mapping logic, tests, and documentation to ensure that UUID[] columns are correctly handled and tested throughout the codebase.

[Copilot]

Pull request overview

This pull request adds support for PostgreSQL UUID[] (UUID array) type mapping to Flink's ARRAY type in the CDC connectors. The changes enable proper capture and deserialization of UUID array columns from PostgreSQL databases in both snapshot and incremental (WAL) replication modes.

Changes:

• Added UUID[] to STRING array type mapping in both source and pipeline PostgreSQL CDC connectors
• Implemented array deserialization converter for PostgreSQL with support for nested element conversion
• Added comprehensive test coverage for UUID arrays in both connector types
• Updated documentation to reflect UUID type support (scalar type only)

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
flink-connector-postgres-cdc/src/test/resources/ddl/column_type_test.sql	Added array_types table with uuid_a1 column for testing UUID[] type
PostgreSQLConnectorITCase.java	Added testArrayTypes test method to verify UUID array handling in snapshot and WAL modes
PostgreSQLDeserializationConverterFactory.java	Implemented createArrayConverter method to handle array deserialization with recursive element conversion
flink-connector-postgres-cdc/.../PostgresTypeUtils.java	Added PG_UUID_ARRAY constant and case mapping to ARRAY
RowDataDebeziumDeserializeSchema.java	Changed createConverter method visibility from private to public to support array element conversion
flink-cdc-pipeline-connector-postgres/src/test/resources/ddl/column_type_test.sql	Updated array_types table to include uuid_a1 column
PostgresFullTypesITCase.java	Added assertions to verify UUID array values in testArrayTypes method
flink-cdc-pipeline-connector-postgres/.../PostgresTypeUtils.java	Added PgOid.UUID_ARRAY case mapping to ARRAY
docs/content/docs/connectors/flink-sources/postgres-cdc.md	Added UUID to the list of PostgreSQL types that map to Flink STRING type
docs/content.zh/docs/connectors/flink-sources/postgres-cdc.md	Added UUID to the list of PostgreSQL types that map to Flink STRING type (Chinese version)

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