feat: remove startup NFO repair, update docs and tests

- Remove NFO repair scan step from ARCHITECTURE.md startup sequence
- Update CHANGELOG.md: rephrase perform_nfo_repair_scan as scheduled scan
- Add test verifying perform_nfo_repair_scan is NOT called in lifespan
- Keep existing folder scan wiring tests and unit tests intact
- NFO_GUIDE.md already correctly describes scheduled scan behavior

tests/integration/test_folder_rename_startup.py

@@ -0,0 +1,109 @@
+"""Integration tests for folder rename service wiring.
+
+These tests verify that:
+1. FolderScanService.run_folder_scan calls validate_and_rename_series_folders.
+2. The rename logic is properly integrated into the scheduled folder scan.
+"""
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import pytest
+
+
+class TestFolderRenameScanCalledInFolderScan:
+    """Verify validate_and_rename_series_folders is invoked from FolderScanService."""
+
+    def test_validate_and_rename_imported_in_folder_scan_service(self):
+        """folder_scan_service.py imports validate_and_rename_series_folders."""
+        import importlib
+
+        source = importlib.util.find_spec(
+            "src.server.services.folder_scan_service"
+        ).origin
+        with open(source, "r", encoding="utf-8") as fh:
+            content = fh.read()
+
+        assert "validate_and_rename_series_folders" in content, (
+            "validate_and_rename_series_folders must be imported in folder_scan_service.py"
+        )
+
+    def test_validate_and_rename_called_in_run_folder_scan(self):
+        """validate_and_rename_series_folders must be called inside run_folder_scan."""
+        import importlib
+
+        source = importlib.util.find_spec(
+            "src.server.services.folder_scan_service"
+        ).origin
+        with open(source, "r", encoding="utf-8") as fh:
+            content = fh.read()
+
+        run_folder_scan_pos = content.find("def run_folder_scan")
+        rename_call_pos = content.find("validate_and_rename_series_folders()")
+
+        assert run_folder_scan_pos != -1, "run_folder_scan method not found"
+        assert rename_call_pos != -1, "validate_and_rename_series_folders call not found"
+        assert rename_call_pos > run_folder_scan_pos, (
+            "validate_and_rename_series_folders must be called INSIDE run_folder_scan"
+        )
+
+
+class TestFolderRenameIntegration:
+    """Integration test: folder rename is triggered during folder scan."""
+
+    @pytest.mark.asyncio
+    async def test_folder_rename_runs_during_scan(self, tmp_path):
+        """When folder_scan_enabled is true, the scan renames mismatched folders."""
+        from src.server.services.folder_scan_service import FolderScanService
+
+        anime_dir = tmp_path / "anime"
+        anime_dir.mkdir()
+        series_dir = anime_dir / "Attack on Titan"
+        series_dir.mkdir()
+        (series_dir / "tvshow.nfo").write_text(
+            "<tvshow><title>Attack on Titan</title><year>2013</year></tvshow>"
+        )
+
+        mock_settings = MagicMock()
+        mock_settings.tmdb_api_key = "test-key"
+        mock_settings.anime_directory = str(anime_dir)
+
+        with patch(
+            "src.config.settings.settings", mock_settings
+        ), patch(
+            "src.server.services.folder_rename_service.settings", mock_settings
+        ), patch(
+            "src.server.services.folder_scan_service.perform_nfo_repair_scan",
+            new_callable=AsyncMock,
+        ), patch(
+            "src.server.services.folder_rename_service._is_series_being_downloaded",
+            return_value=False,
+        ), patch(
+            "src.server.services.folder_rename_service._update_database_paths",
+            new_callable=AsyncMock,
+        ):
+            service = FolderScanService()
+            await service.run_folder_scan()
+
+        assert not series_dir.exists()
+        assert (anime_dir / "Attack on Titan (2013)").is_dir()
+
+    @pytest.mark.asyncio
+    async def test_folder_rename_skipped_when_prerequisites_not_met(self, tmp_path):
+        """If anime directory is missing, rename logic is skipped gracefully."""
+        from src.server.services.folder_scan_service import FolderScanService
+
+        mock_settings = MagicMock()
+        mock_settings.tmdb_api_key = "test-key"
+        mock_settings.anime_directory = str(tmp_path / "nonexistent")
+
+        with patch(
+            "src.config.settings.settings", mock_settings
+        ), patch(
+            "src.server.services.folder_scan_service.perform_nfo_repair_scan",
+            new_callable=AsyncMock,
+        ), patch(
+            "src.server.services.folder_rename_service.validate_and_rename_series_folders"
+        ) as mock_rename:
+            service = FolderScanService()
+            await service.run_folder_scan()
+
+        mock_rename.assert_not_called()