Sprint E XXL Phase 4γ MVP deploy — POST /api/v1/render endpoint.
Two changes:
1. Image tag v202604272339 → v202604280946 (TtsReader@d9e0a58 master tip
includes the new RenderController + RenderService + 9 tests).
2. New TtsReader__Render__CdnDirectory=/data/cdn env var. Default
wwwroot/cdn resolves under the read-only app filesystem when
runAsNonRoot=true; pin to the existing writable PVC mount alongside
other TtsReader runtime data. Manifests + cue audio land at
/data/cdn/sha256/<hash>/manifest.json + cues/.
Pre-existing PVC mount at /data/ already covers this — no PVC change
needed, just the env var override.
Pairs with TtsReader@d9e0a58 master tip (ready for image build + import).
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