Add Music Booth history and requeueing

[mpiorowski]

Summary

• Adds a community Music Booth History so previously played YouTube tracks can be reviewed, voted on, and queued again without past votes affecting the new queue item.

Changes

• Adds DB-backed media_history_items and media_history_votes tables/models.
• Records tracks into history when they are promoted to Now Playing.
• Adds a Queue/History switch in the Music Booth modal.
• Supports history upvotes/downvotes/clearing votes and Enter-to-requeue.
• Updates booth help text and audio context docs for the new history behavior.

Behavior notes

• History keeps up to 30 unique YouTube tracks, ranked by history vote score and recency.
• Requeued history tracks create fresh queue rows with 0 live queue votes.
• Audio bans block history voting and requeueing; normal submission rate limits apply to requeueing.
• This includes a new migration, 073_create_media_history.sql.

Feature flags

• None.

Screenshots / Video

• Not included in this draft; attach before review.

Testing

• Automated: Not run; repo policy says agents should not run cargo test, cargo nextest, or cargo clippy.
• Manual: Not run; no live TUI verification was performed for this draft.