feat: Add comprehensive IMDb detection for TV shows

- Add find_series_imdb_id method to check directory, filenames, and tvshow.nfo
- Add TV show batch validation in webhook batcher (like movies)
- Ensures TV webhooks process correct series by validating IMDb match
- Prevents mismatched processing like Girls (2012) -> Gachiakuta (2025)
- Comprehensive detection checks: folder name, file names, NFO content

core/nfo_manager.py

@@ -126,6 +126,37 @@ class NFOManager:
         print(f"❌ No IMDb or TMDB ID found in directory, filenames, or NFO for: {movie_dir.name}")
         return None
     
+    def find_series_imdb_id(self, series_dir: Path) -> Optional[str]:
+        """Find IMDb ID from TV series directory name, filenames, or tvshow.nfo file"""
+        print(f"🔍 Searching for IMDb ID in TV series: {series_dir.name}")
+        
+        # First try directory name
+        imdb_id = self.parse_imdb_from_path(series_dir)
+        if imdb_id:
+            print(f"✅ Found IMDb ID in series directory name: {imdb_id}")
+            return imdb_id
+            
+        # Try all files in the directory for IMDb ID patterns
+        for file_path in series_dir.iterdir():
+            if file_path.is_file():
+                imdb_id = self.parse_imdb_from_path(file_path)
+                if imdb_id:
+                    print(f"✅ Found IMDb ID in series filename: {imdb_id} from {file_path.name}")
+                    return imdb_id
+                    
+        # Finally, try tvshow.nfo file content
+        nfo_path = series_dir / "tvshow.nfo"
+        imdb_id = self.parse_imdb_from_nfo(nfo_path)
+        if imdb_id:
+            if imdb_id.startswith("tmdb-"):
+                print(f"✅ Found TMDB ID in tvshow.nfo: {imdb_id} from {nfo_path} (fallback mode)")
+            else:
+                print(f"✅ Found IMDb ID in tvshow.nfo: {imdb_id} from {nfo_path}")
+            return imdb_id
+            
+        print(f"❌ No IMDb or TMDB ID found in series directory, filenames, or tvshow.nfo for: {series_dir.name}")
+        return None
+    
     def extract_nfoguard_dates_from_nfo(self, nfo_path: Path) -> Optional[Dict[str, str]]:
         """Extract NFOGuard-managed dates from existing NFO file"""
         if not nfo_path.exists():