PgDataService

PgDataService manages PostgreSQL data storage for DataLens, replacing DuckDBService. It handles schema creation, table registry, data insertion, and querying, supporting project-specific schemas, and facilitates text chunk and table metadata storage, with type conversions guiding data loading and query execution in PostgreSQL. PgDataService is an alternative service managing PostgreSQL connections, complementing DuckDBService for DuckDB database management. DataLensPostgresRunner wraps PgDataService to enforce project-scoped schema isolation for SQL execution.