Santo Shakil 8c7bd28864 fix(mobile): run iOS bg task phases in parallel
onIosUpload runs sync local, sync remote, hash and handle backup
sequentially. on the bg refresh task path that's a 20s budget from
iOS, and sync + hash usually eat all of it before backup gets a turn
to enqueue any candidates.

these phases don't actually depend on each other. local + remote sync
touch different tables. hash works off whatever's already in drift.
handle backup reads candidates and just enqueues to URLSession bg.
anything one phase produces in this fire shows up to the others on
the next fire, and server-side dedup catches the rare race where
backup enqueues something sync remote was about to mark as already
uploaded.

so this runs all four concurrently via Future.wait, with hash getting
the full maxSeconds-1 budget instead of a fixed 5s. outer budget
timeout still caps everything before iOS expires.

second small change: getAssetsToHash orders by createdAt DESC instead
of id ASC to match getCandidates. when hash runs inside a refresh
fire it processes recent photos first.
2026-05-08 16:42:03 +06:00


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