Fix postgres unstable

Author: ChrisPC-39

mcpgateway/db.py

@@ -52,11 +52,18 @@
 # Create SQLAlchemy engine with connection pooling
 engine = create_engine(
     settings.database_url,
+    pool_pre_ping=True,
     pool_size=settings.db_pool_size,
     max_overflow=settings.db_max_overflow,
     pool_timeout=settings.db_pool_timeout,
     pool_recycle=settings.db_pool_recycle,
-    connect_args={"check_same_thread": False} if settings.database_url.startswith("sqlite") else {},
+    connect_args = {
+        "keepalives": 1,
+        "keepalives_idle": 30,
+        "keepalives_interval": 5,
+        "keepalives_count": 5,
+    }
+    # connect_args={"check_same_thread": False} if settings.database_url.startswith("sqlite") else {},
 )
 
 # Session factory