Feature Request: Add Read-Only PostgreSQL MCP Tool Integration

Feature Request: Add Read-Only PostgreSQL MCP Tool Integration: a task in LegoFlow-SWE (Harbor dataset). Parameters - sql: str – The SELECT statement to execute. - params: dict (optional) – Query parameters.

The task

**Parameters** - `sql: str` – The `SELECT` statement to execute. - `params: dict` (optional) – Query parameters.

Part of Lego-X/LegoFlow-SWE.