fix: Remove nfo_migration_required source and ensure proper date lookup

- Remove bogus 'nfo_migration_required' source that bypassed proper date lookup
- Ensure episodes with existing NFOs still get processed through Sonarr API
- Episodes should get proper dateadded from Sonarr import history or airdate fallback
- Version bump to 1.9.3-longnames

VERSION

@@ -1 +1 @@
-1.9.2-longnames
+1.9.3-longnames

nfoguard.py

@@ -449,20 +449,26 @@ class TVProcessor:
                 existing_nfo = self.nfo_manager.find_existing_episode_nfo(season_dir, season_num, episode_num)
                 
                 if existing_nfo:
-                    # Force processing of this episode for NFO migration
-                    episode_dates[(season_num, episode_num)] = (None, None, "nfo_migration_required")
+                    # Force processing of this episode to ensure proper dates
                     nfo_episodes_found += 1
                     
         if nfo_episodes_found > 0:
-            _log("INFO", f"Found {nfo_episodes_found} episodes with existing NFO files requiring migration")
+            _log("INFO", f"Found {nfo_episodes_found} episodes with existing NFO files")
         
-        # Find missing episodes (not in cache and no existing NFO)
+        # Find missing episodes (not in cache)  
         cached_keys = set(episode_dates.keys())
         missing_keys = set(disk_episodes.keys()) - cached_keys
         
+        # Add episodes with existing NFOs to missing_keys so they get proper date lookup
+        for season_num, episode_num in disk_episodes.keys():
+            if (season_num, episode_num) not in cached_keys:
+                season_dir = series_path / config.tv_season_dir_format.format(season=season_num)
+                existing_nfo = self.nfo_manager.find_existing_episode_nfo(season_dir, season_num, episode_num)
+                if existing_nfo:
+                    missing_keys.add((season_num, episode_num))
+        
         if not missing_keys:
-            if nfo_episodes_found == 0:
-                _log("INFO", "All episodes found in cache")
+            _log("INFO", "All episodes found in cache")
             return episode_dates
         
         _log("INFO", f"Querying APIs for {len(missing_keys)} missing episodes")