When a framework parser (paramount, criterion, pixelogic, ctrm, dbp,
deluxe) is chosen but its label list covers only a subset of the
stream slots MPLS knows about, merge MPLS-derived entries for the
uncovered (stream_type, stream_number) slots. Framework labels keep
their richer fields (purpose=Commentary, codec_hint with "Atmos",
qualifier=Sdh); MPLS only fills slots the framework left unnamed.
Implementation:
- `fn fill_gaps_from_mpls` walks the MPLS label list, pushing any
entry whose (type, number) tuple isn't already in the framework
output. Stable sort by (type, number) groups audios before
subtitles in the merged result.
- Called from both `extract()` and `analyze()`. Skipped when the
chosen parser is itself `mpls_universal` (no gaps possible).
- `LabelAnalysis::gap_fill_added` field reports how many slots got
filled — useful diagnostic from `labels-analyze`.
- `StreamLabelType` gains `Eq + Hash` so the dedup HashSet works.
Tested via 4 new unit tests (155 of 155 labels tests passing, was
151). End-to-end on partial-yield corpus discs:
- disc-05 (Oppenheimer): pixelogic 4/5 already covered, gap_fill_added=0
- disc-11 (Dune Pt 2): pixelogic 8/11 already covered, gap_fill_added=0
(Real-world gap-fill activations are rare in the current corpus because
pixelogic already incorporates MPLS-equivalent data when matching;
the merge is defensive for less-thorough frameworks.)
matthew
ee9bcf24dd