Adds per-call instrumentation to _run_video_inference so we can see
where the cost goes on slow videos: frame extraction (ffmpeg seeks),
WD14, or SigLIP. Also captures file size to correlate slowness with
file characteristics.
Output shape:
tag_and_embed: video 7384 timings extract=12.3s wd14=24.1s
siglip=82.6s frames=10/10 file_size=412.5MB
Investigating a soft-time-limit storm where the deployed code has
soft_time_limit=900 but workers are firing limits at ~120s intervals.
This patch is pure observability — no behavior change.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
bvandeusen
641a52d1ad