Asset download fetches missing clientAbort.signal video, image gen, img2img

[Sertug17]

Bug

Three asset download fetch() calls are missing { signal: clientAbort.signal }. When the client disconnects after upstream returns but during the local cache download, the proxy continues downloading and writing to disk for nobody.

Same class as #251 (fixed in v0.12.252 for the upstream payFetch calls), but these post-response download fetches were missed.

Affected lines (current main)

Handler	Line	Code	Signal?
/v1/videos/generations download	3215	await fetch(clip.url)	❌ missing
/v1/images/generations download	2771	await fetch(img.url)	❌ missing
/v1/images/image2image result download	2915	await fetch(img.url)	❌ missing

Working references in the same file

• Audio download (line 3016): await fetch(track.url, { signal: clientAbort.signal }) ✅
• img2img input download (line 2851): await fetch(val, { signal: clientAbort.signal }) ✅

Impact

• Video files can be 50–200 MB. A disconnected client leaves the proxy downloading and writing the full file to disk, blocking the handler and wasting bandwidth.
• Image downloads are smaller but the pattern is identical.

Fix

Pass { signal: clientAbort.signal } to all three fetch calls. One line change each.

[VickyXAI]

Fixed in 50d8447 (v0.12.255, on npm). All three download fetches now pass { signal: clientAbort.signal } — video clips, generations result images, and img2img result images — matching the audio handler's existing pattern. Landed from your PR #276 with authorship preserved. Thanks for the precise line-level report!