fix: use timezone-aware datetime in raw-SQL and endpoint queries

backend/database_handler/transactions_processor.py

@@ -1005,9 +1005,9 @@ def get_activated_transactions_older_than(self, seconds: int) -> list[dict]:
         Returns:
             List of transaction data dictionaries for stuck transactions
         """
-        from datetime import datetime, timedelta
+        from datetime import datetime, timedelta, timezone
 
-        cutoff_time = datetime.now() - timedelta(seconds=seconds)
+        cutoff_time = datetime.now(timezone.utc) - timedelta(seconds=seconds)
         stuck_transactions = (
             self.session.query(Transactions)
             .options(selectinload(Transactions.triggered_transactions))

backend/node/base.py

@@ -805,7 +805,7 @@ async def deploy_contract(
 
         transaction_datetime = self._date_from_str(transaction_created_at)
         if transaction_datetime is None:
-            transaction_datetime = datetime.datetime.now()
+            transaction_datetime = datetime.datetime.now(tz=datetime.timezone.utc)
 
         return await self._run_genvm(
             from_address,

backend/protocol_rpc/endpoints.py

@@ -2654,13 +2654,13 @@ def dev_get_pool_status(sqlalchemy_db) -> dict:
     Returns:
         dict: Pool status information including timestamp and metrics
     """
-    from datetime import datetime
+    from datetime import datetime, timezone
 
     engine = sqlalchemy_db.engine
     pool = engine.pool
 
     return {
-        "timestamp": datetime.now().isoformat(),
+        "timestamp": datetime.now(timezone.utc).isoformat(),
         "pool": {
             "size": pool.size(),
             "checked_out": pool.checkedout(),

backend/services/usage_metrics_service.py

@@ -4,7 +4,7 @@
 import math
 import os
 from typing import Any, Optional
-from datetime import datetime
+from datetime import datetime, timezone
 import aiohttp
 from loguru import logger
 
@@ -464,7 +464,7 @@ def _safe_int(self, value: Any) -> int:
     def _format_created_at(self, created_at) -> str:
         """Format created_at to ISO8601 string."""
         if created_at is None:
-            return datetime.utcnow().isoformat()
+            return datetime.now(timezone.utc).isoformat()
 
         if isinstance(created_at, datetime):
             return created_at.isoformat()