fix(downloads): clip long titles to fit display_name (VARCHAR 255)

A download whose source title exceeded 255 chars (e.g. a recipe baked into a
Facebook video's title) failed with a StringDataRightTruncation: the worker
auto-fills an empty display_name from the title, which overflows the 255-char
column. Clip the title to 255 at every point it flows into display_name (worker
completion paths + enqueue); the full title is untouched on the asset. Pre-existing
latent bug, surfaced by an unusually long title.

Release v0.31.1.

VERSION

@@ -1 +1 @@
-0.31.0
+0.31.1

backend/app/downloads/service.py

@@ -114,7 +114,7 @@ def enqueue(
         source_ref=source_ref,
         profile_id=profile_id,
         profile_snapshot=spec,
-        display_name=display_name or (asset.title if asset.status == "ready" else None),
+        display_name=display_name or (asset.title[:255] if asset.status == "ready" and asset.title else None),
         status="queued",
         queue_pos=_next_queue_pos(db),
     )

backend/app/worker.py

@@ -203,7 +203,8 @@ def _finish_from_cache(job_id: int, asset_id: int) -> None:
             job.progress = 100
             job.phase = None
             if not job.display_name:
-                job.display_name = asset.title
+                # display_name is VARCHAR(255); a title can be longer (e.g. a recipe in the title).
+                job.display_name = asset.title[:255] if asset.title else None
             asset.last_access_at = datetime.now(timezone.utc)
         db.commit()
 
@@ -425,7 +426,8 @@ def _download(job_id: int, asset_id: int, source_kind: str, source_ref: str, spe
                 job.speed_bps = None
                 job.eta_s = None
                 if not job.display_name:
-                    job.display_name = meta.title
+                    # display_name is VARCHAR(255) — clip a long title (see _fill_asset_meta_early).
+                    job.display_name = meta.title[:255] if meta.title else None
             db.commit()
         log.info("job %s done: %s", job_id, rel)
 

frontend/src/lib/releaseNotes.ts

@@ -14,6 +14,14 @@ export interface ReleaseEntry {
 }
 
 export const RELEASE_NOTES: ReleaseEntry[] = [
+  {
+    version: "0.31.1",
+    date: "2026-07-07",
+    summary: "Fix: a download could fail when the video's title was very long.",
+    fixes: [
+      "Downloads: fixed a download failing right at the end when the source's title was very long (e.g. a whole recipe in the title) — the auto-filled display name overflowed its limit. Long titles are now trimmed for the name; the full title still shows everywhere else.",
+    ],
+  },
   {
     version: "0.31.0",
     date: "2026-07-07",