feat: PhotoPrism M0 bring-up — compose stack, web client, sidecar, migrate
Replace the legacy mule-image backend with PhotoPrism plus a thin SvelteKit client and a Node sidecar for endpoints PhotoPrism doesn't expose (file rename), and add a two-phase migrator (metadata via PUT, heaps → albums) for the existing Postgres library. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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