Get Table Metadata Endpoint

Get comprehensive table metadata, statistics, and clustering information.

This endpoint provides all data needed for table optimization analysis:

• Table metadata (schema, columns, data types)
• Table statistics (storage, read/write counts, costs)
• Clustering information (if clustering keys exist)

Args: request: Contains fully_qualified_names (list of database.schema.table) and optional instance_id

Returns: Dictionary with table names as keys and optimization data as values