Update PostgreSQL server and test files

- Updated postgres_server.py with latest functionality
- Updated test_server.py with corresponding test cases
- Ensuring compatibility with all 237 PostgreSQL tools

Author: mukul975

postgres_server.py

@@ -5,9 +5,7 @@
 import logging
 from typing import Any, Dict, List, Optional
 import asyncpg
-from asyncpg import Record
 from mcp.server.fastmcp import FastMCP, Context
-from mcp.server.fastmcp.resources import base
 from pydantic import BaseModel, Field
 
 # Set up logging

test_server.py

@@ -10,7 +10,7 @@
 from postgres_server import (
     PostgreSQL_list_tables, 
     PostgreSQL_describe_table, 
-    PostgreSQL_execute_query,
+    execute_query,
     TableInfo,
     ColumnInfo
 )
@@ -31,7 +31,7 @@ async def test_connection():
 async def test_list_tables():
     """Test listing tables in public schema"""
     try:
-        tables = await list_tables("public")
+        tables = await PostgreSQL_list_tables("public")
         print(f"✅ Found {len(tables)} tables in 'public' schema")
         for table in tables[:5]:  # Show first 5 tables
             print(f"  - {table.table_name} ({table.table_type})")