Track format.tags.title and format.tags.comment on media_items via a new
containerTitle() helper producing "Name (Year)" for movies and
"Series (Year) - S01E02 - Title" for episodes. Analyzer and
recomputePlanAfterToggle now flag non-canonical container title and
non-empty comment as non-noop ("Fix container title", "Clear comment"),
and verifyDesiredState checks them post-ffmpeg. buildStreamFlags writes
the canonical title and clears comment on every run.
Existing libraries need a rescan to populate the new columns.
root cause of duplicate pipeline entries: rescan.ts flipped done plans
back to pending whenever a post-job jellyfin refresh returned stale
metadata, putting the item back in review and letting a second jobs row
pile up in done. done is now sticky across rescans (error still
re-opens for retries).
second line of defense: before spawning ffmpeg, ffprobe the file and
compare audio count/language/codec order + embedded subtitle count
against the plan. if it already matches, mark the job done with the
reason in jobs.output and skip the spawn. prevents corrupting a
post-processed file with a stale stream-index command.