better time usings

src/server/database/service.py

@@ -14,7 +14,7 @@ All services support both async and sync operations for flexibility.
 from __future__ import annotations
 
 import logging
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from typing import Dict, List, Optional
 
 from sqlalchemy import delete, select, update
@@ -276,7 +276,7 @@ class EpisodeService:
             file_path=file_path,
             file_size=file_size,
             is_downloaded=is_downloaded,
-            download_date=datetime.utcnow() if is_downloaded else None,
+            download_date=datetime.now(timezone.utc) if is_downloaded else None,
         )
         db.add(episode)
         await db.flush()
@@ -380,7 +380,7 @@ class EpisodeService:
         episode.is_downloaded = True
         episode.file_path = file_path
         episode.file_size = file_size
-        episode.download_date = datetime.utcnow()
+        episode.download_date = datetime.now(timezone.utc)
         
         await db.flush()
         await db.refresh(episode)
@@ -597,9 +597,9 @@ class DownloadQueueService:
         
         # Update timestamps based on status
         if status == DownloadStatus.DOWNLOADING and not item.started_at:
-            item.started_at = datetime.utcnow()
+            item.started_at = datetime.now(timezone.utc)
         elif status in (DownloadStatus.COMPLETED, DownloadStatus.FAILED):
-            item.completed_at = datetime.utcnow()
+            item.completed_at = datetime.now(timezone.utc)
         
         # Set error message for failed downloads
         if status == DownloadStatus.FAILED and error_message:
@@ -807,7 +807,7 @@ class UserSessionService:
         """
         query = select(UserSession).where(
             UserSession.is_active == True,
-            UserSession.expires_at > datetime.utcnow(),
+            UserSession.expires_at > datetime.now(timezone.utc),
         )
         
         if user_id:
@@ -833,8 +833,8 @@ class UserSessionService:
         session = await UserSessionService.get_by_session_id(db, session_id)
         if not session:
             return None
-        
-        session.last_activity = datetime.utcnow()
+
+        session.last_activity = datetime.now(timezone.utc)
         await db.flush()
         await db.refresh(session)
         return session
@@ -871,7 +871,7 @@ class UserSessionService:
         """
         result = await db.execute(
             delete(UserSession).where(
-                UserSession.expires_at < datetime.utcnow()
+                UserSession.expires_at < datetime.now(timezone.utc)
             )
         )
         count = result.rowcount