fix: NFO timestamp consistency and enhanced episode processing debug

NFO Management Timestamp Fix:
- Fix NFO management comments to use local timezone instead of UTC
- Both movie and TV episode NFO files now show consistent local timezone
- Comments now show: <!-- managed by NFOGuard at 2025-09-14T09:29:06-04:00 -->

Enhanced Episode Processing Debug:
- Add comprehensive debug logging for webhook episode database lookups
- Track IMDb ID and season/episode info throughout processing pipeline
- Add database write verification to catch storage issues immediately
- Enhanced logging will help identify duplicate processing root causes

This addresses the issue where episodes were being treated as new downloads
instead of finding existing database entries, helping prevent duplicate processing.

core/nfo_manager.py

@@ -9,7 +9,7 @@ from datetime import datetime, timezone
 from typing import Optional, Dict, Any
 import xml.etree.ElementTree as ET
 
-from core.logging import _log
+from core.logging import _log, _get_local_timezone
 
 
 class NFOManager:
@@ -194,7 +194,8 @@ class NFOManager:
 
         # Add footer comments with timestamp
         self._strip_existing_footer_comments(root)
-        current_time = datetime.now(timezone.utc).isoformat(timespec="seconds")
+        local_tz = _get_local_timezone()
+        current_time = datetime.now(local_tz).isoformat(timespec="seconds")
         root.append(ET.Comment(f" source: Movie; {source_detail} "))
         root.append(ET.Comment(f" managed by {self.manager_brand} at {current_time} "))
 
@@ -289,7 +290,8 @@ class NFOManager:
         
         # Add source comments with timestamp
         if source_detail:
-            current_time = datetime.now(timezone.utc).isoformat(timespec="seconds")
+            local_tz = _get_local_timezone()
+            current_time = datetime.now(local_tz).isoformat(timespec="seconds")
             xml_lines.append(f"  <!-- source: TV Episode; {source_detail} -->")
             xml_lines.append(f"  <!-- managed by {self.manager_brand} at {current_time} -->")