3e17d37b4e
Observe-only diagnostic (lockstep digest unaffected) added during the milestone-2 video investigation. `XENIA_AUDIT_PC_TRACE=lo:hi:tid` logs AUDIT-TRACE r3/r4/r5/r30/r31 for blocks in [lo,hi) on a given tid — used to capture the demux registrar's stream-id (r4) at sub_82509E40. Handoff (full detail in memory cont.10ff-10ii): - Video decode is GUEST SOFTWARE (decoder vt 0x82009f70, 615 fns/30k instr, zero host/video imports) — no host codec to build; fix is upstream. - Video IS registered/routed/queued (refutes "not selected"); the engine never reaches ready-state, pump sub_825078D8 bails 5262x, begin-playback sub_825076F0 never fires -> 2000ms readiness timeout. - CANARY oracle measured: video producer sub_824FF678 drives demux SM sub_825211A0 72x+ (loops/pulls continuously); OURS drives it 1x then the pull loop sub_824FA8A0 exits on no-data (assembly sub_8250A2B0 returns 0x8050000B = incomplete unit). Root: ours delivers INCOMPLETE video units where canary delivers complete ones. - NEXT: compare ours-vs-canary fragment chain [slot+24] for the video stream (missing end-fragment / fragment-header mis-parse). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>