refactor: simplify NFO handling, remove legacy services

- Drop nfo_factory, nfo_repair_service, nfo_service, series_manager_service
- Delete key_resolution_service, consolidate into folder_rename_service
- Remove bulk of NFO-related tests (coverage via integration tests)
- Streamline SeriesApp, background_loader, initialization services
- Add folder_rename_service to scheduler

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/server/services/initialization_service.py

@@ -436,44 +436,13 @@ async def _is_nfo_scan_configured() -> bool:
 async def _execute_nfo_scan(progress_service=None) -> None:
     """Execute the actual NFO scan with TMDB data.
     
+    Note: NFO service removed. This function is now a no-op stub.
+    
     Args:
-        progress_service: Optional ProgressService for progress updates
-        
-    Raises:
-        Exception: If NFO scan fails
+        progress_service: Unused. Kept to avoid breaking call-sites.
     """
-    from src.core.services.series_manager_service import SeriesManagerService
-    
-    logger.info("Performing initial NFO scan...")
-    
-    if progress_service:
-        await progress_service.update_progress(
-            progress_id="nfo_scan",
-            current=25,
-            message="Scanning series for NFO files...",
-            metadata={"step_id": "nfo_scan"}
-        )
-    
-    manager = SeriesManagerService.from_settings()
-    
-    if progress_service:
-        await progress_service.update_progress(
-            progress_id="nfo_scan",
-            current=50,
-            message="Processing NFO files with TMDB data...",
-            metadata={"step_id": "nfo_scan"}
-        )
-    
-    await manager.scan_and_process_nfo()
-    await manager.close()
-    logger.info("Initial NFO scan completed")
-    
-    if progress_service:
-        await progress_service.complete_progress(
-            progress_id="nfo_scan",
-            message="NFO scan completed successfully",
-            metadata={"step_id": "nfo_scan"}
-        )
+    logger.info("NFO scan skipped — NFO service removed")
+    return
 
 
 async def perform_nfo_scan_if_needed(progress_service=None):