Brummel
66b3b7e4c8
Replaces the `.transcript.txt` sidecar with a structured `.json` file for recording metadata. This change consolidates transcript text, duration, and other potential metadata into a single, extensible JSON object. This also refactors the `TranscriptState` enum to better represent the on-disk state (absence of file means pending) and the in-memory representation. The `Transcript` enum now specifically models the terminal outcomes of the transcriber (`Silent` or `Content`). The commit includes updates to documentation, data structures, path handling, and various tests to align with the new metadata format.