Implements a complete structured logging system for troubleshooting and service development.
Features:
- Binary toggle via --debug flag or debug: true in config
- JSON Lines (.jsonl) format for easy parsing and analysis
- Comprehensive logging of all operations:
* Session info (version, platform, Python version)
* CLI parameters and service configuration
* CDM details (Widevine/PlayReady, security levels)
* Authentication status
* Title and track metadata
* DRM operations (PSSH, KIDs, license requests)
* Vault queries with key retrieval
* Full error traces with context
- Configurable key logging via debug_keys option
- Smart redaction (passwords, tokens, cookies always redacted)
- Error logging for all critical operations:
* Authentication failures
* Title fetching errors
* Track retrieval errors
* License request failures (Widevine & PlayReady)
* Vault operation errors
- Removed old text logging system
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