v2.56.1

v2.56.1

Final reliability batch from the exhaustive audit (Wave B + selected P2/P3).

Fixed

• (EX11) audio_track_probe reported available: true for track index 0 and
  negatives; audio tracks are 1-indexed, so it now requires 1 <= index <= count.
• (EX10) _find_timeline_item_by_id logs GetTrackCount failures instead of
  silently skipping a track type (so a real API error isn't read as "item not found").
• (P3) raw timeline_item_color.set_cdl validates the ASC-CDL payload before
  SetCDL, matching its safe twin — malformed CDL returns a structured error.
• (P2) media_pool.delete_timelines is read-back verified via the project timeline
  count (not the unreliable boolean); import_folder validates required path.

Validation

• Full offline suite green (1292 tests). Count-based read-back and input validation
  are reliable offline; remaining read-backs whose observations need live Resolve
  confirmation are deferred (documented).