feat(images): add image variant pipeline fields (BE-1)#470
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Add columns to support the image preprocessing pipeline (BE-1): - image_key: stable content-addressed base key for derived variants - variants_ready: gate flag, true only after all variants are uploaded - ready_max_width: ascending-generation watermark; a tier is ready iff its width <= ready_max_width (lets the frontend render partial backfill state without 404s) Reuses the existing blurhash column as the placeholder (no duplicate thumbhash column). Adds an index on (variants_ready, del) to support the backfill queue scan. Gallery queries select image.* so the new fields are exposed to ImageType consumers automatically. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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BE-1 — DB variant fields (foundational, unblocks FE-3)
Part of the image-performance overhaul (parent task #1 in #picimpact). This is the foundational schema change the rest of the pipeline + the frontend variant-consumption work depend on.
What
Adds three columns to
images:image_key(TEXT?) — stable content-addressed base key; all derived variant URLs are built as{baseKey}_{width}.{avif|webp}.variants_ready(bool, defaultfalse) — gate flag, flipped totrueonly after all variants are uploaded (no half-baked images in the gallery).ready_max_width(int, default0) — ascending-generation watermark. A tier is ready iffwidth <= ready_max_width, so the frontend can render partial backfill state (soft-but-never-broken) without 404s.Adds index
(variants_ready, del)to support the backfill queue scan (WHERE variants_ready = false AND del = 0).Notes
blurhashcolumn as the placeholder (it already holds a thumbhash-encoded string consumed byhooks/use-blurhash.ts) — no duplicatethumbhashcolumn added.width/heightalready exist on the model (used for aspect-ratio placeholders → reduces CLS).image.*, so the new fields flow toImageTypeconsumers automatically;types/index.tsupdated to declare them.Test plan
prisma validate+prisma formatpass.🤖 Generated with Claude Code