Move embedded Python scripts out of Nix string interpolation into
standalone files under scripts/. Each script reads its configuration
from a JSON file passed as the first CLI argument.
Shared utilities (API key reading, API polling, health check loop)
are consolidated into common.py, eliminating three copies of
read_api_key and wait_for_api.
Implementation improvements included in the extraction:
- Remove pyarr dependency; all HTTP calls use raw requests
- Add update semantics: download clients and synced apps are now
compared against desired state and updated on drift via PUT
- Bazarr configure_provider compares API keys and updates stale ones
- Narrow health_check_loop exception clause from bare Exception to
(RequestException, ValueError, KeyError)
- Fix double resp.json() call in resolve_profile_id (jellyseerr)
- Replace os.system with subprocess.run for Jellyseerr restart
- Handle missing 'value' key in Servarr field API responses
