Sounding 0.2.2

• Added a hybrid broadcast timeline with zoomable marker rails and persisted song/ad marker projection.
• Normalized program metadata at ingest so repeated ID3/fingerprint hits collapse into coherent song spans.
• Added per-stream transcript display modes so song lyrics can be hidden while non-song content remains available.
• Improved song timeline persistence, export-ready marker storage, and stream registry settings for cached audio.
• Hardened runtime stop, restart, and wake recovery so stuck AVFoundation playback cleanup cannot leave the app falsely running.
• Added regression coverage for metadata normalization, timeline projection, song persistence, and playback-stop timeouts.