chore: remove obsolete DEVELOPMENT.md and consolidate task tracking docs

CHANGELOG.md

@@ -2,6 +2,20 @@
 
 <!-- markdownlint-disable MD024 -->
 
+## [Unreleased]
+
+## [1.0.12] - 2026-08-11
+
+### Changed
+
+- **Task tracking consolidated**: Removed `DEVELOPMENT.md` and moved all development tasks to `.github/instructions/BACKLOG.md` as the single source of truth. `TODO.md` updated to reference `BACKLOG.md` and `DONE.md`.
+
+### Fixed
+
+- **Playout R2 endpoint validation**: `initR2Client()` now validates all required R2 environment variables (`R2_ENDPOINT`, `R2_ACCESS_KEY_ID`, `R2_SECRET_ACCESS_KEY`, `R2_BUCKET_NAME`) before creating the S3 client. Previously, an empty `R2_ENDPOINT` caused cryptic `Custom endpoint '' was not a valid URI` errors on every segment upload attempt. Playout now gracefully degrades when R2 is not configured — local HLS via nginx continues to work.
+- **CD workflow missing R2 secrets**: `.gitea/workflows/cd.yml` "Prepare environment" step now injects all R2_ variables (`R2_ACCESS_KEY_ID`, `R2_SECRET_ACCESS_KEY`, `R2_BUCKET_NAME`, `R2_ENDPOINT`, plus admin variants) from Gitea secrets. Previously the generated `.env` was missing R2 entirely, causing the playout container to start with an empty endpoint.
+- **Deployment docs**: `docs/DEPLOYMENT.md` now includes explicit R2 and Cloudflare variable lists plus a "Gitea Secrets" table documenting all 15 required secrets.
+
 ## [1.0.11] - 2026-08-10
 
 ### Added