Rebuild parquet shards with corrected per-frame active-speaker face/lip (video bytes unchanged)

Fix active-speaker face/lip: per-frame speaker selection; drop match_seq==2; scalars = frame-0 aliases

Add derived training artifacts: alignnorm npz, per-frame lip sidecar, keep-list (8,884) (#3)

Replace parts_001-040 (MonST3R, 32,176 clips) with parts_001-030 (MegaSaM, 8,989 clips, metric)

Add parts_001-030 manifest (8989 clips, 6 shards)

Add MegaSaM parquet shard 6/6 (438 clips)

Add MegaSaM parquet shard 5/6 (1544 clips)

Add MegaSaM parquet shard 4/6 (1616 clips)

Add MegaSaM parquet shard 3/6 (1795 clips)

Add MegaSaM parquet shard 2/6 (1808 clips)

Add MegaSaM parquet shard 1/6 (1788 clips)

Switch annotations from MonST3R to MegaSaM 001-030 (metric, w2c, per-frame speaker face/lip)

docs: document annotations/ npz (poses + face/lip bbox + captions)

Add monst3r pose + face/lip-bbox annotations (parts 001-040)

Add files using upload-large-folder tool

initial commit