[NOTICKET] Add pool_pre_ping to validate db connection

externals/databases/database.py

@@ -14,7 +14,9 @@ DATABASE_URL = EnvPostgresConstants.CONSTRING.\
 engine = create_async_engine(
     DATABASE_URL,
     echo=False,
-    future=True
+    future=True,
+    pool_pre_ping=True,
+    pool_recycle=300, 
 )
 
 AsyncSessionLocal = async_sessionmaker(
@@ -48,10 +50,10 @@ async def get_db():
 #         raise
 
 
-@asynccontextmanager
-async def db_session():
-    async with AsyncSessionLocal() as session:
-        try:
-            yield session
-        finally:
-            await session.close()
+# @asynccontextmanager
+# async def db_session():
+#     async with AsyncSessionLocal() as session:
+#         try:
+#             yield session
+#         finally:
+#             await session.close()