Add audio verification and duplicate tracking features

- Integrated `plexapi` and `python-dotenv` as dependencies in `flake.nix` and `pyproject.toml` for enhanced functionality.
- Implemented new modules for audio verification and duplicate tracking, including `audio_verification.py`, `duplicate_finder.py`, and `track_verification.py`.
- Updated `main.py` to utilize the new modules for identifying and managing duplicate single tracks in Lidarr, with detailed logging and confidence scoring.
- Enhanced the `find_duplicate_singles` function to support audio verification results and metadata migration to Plex.
- Refactored existing code for improved structure and maintainability, ensuring better integration of new features.

src-cleanup/pyproject.toml

@@ -3,7 +3,7 @@ requires = ["setuptools"]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools]
-py-modules = ["main"]
+py-modules = ["main", "lidarr_client", "audio_verification", "track_verification", "plex_metadata", "duplicate_finder"]
 
 [project]
 name = "lidarr-cleanup-singles"
@@ -12,6 +12,8 @@ description = "Identify and optionally delete duplicate single tracks in Lidarr"
 requires-python = ">=3.8"
 dependencies = [
     "requests",
+    "python-dotenv",
+    "plexapi",
 ]
 
 [project.scripts]