fix: parallel CD trigger, remove env blocker, cleanup release pipeline

CHANGELOG.md

@@ -12,6 +12,10 @@
 ### Changed
 
 - **Prod prometheus**: Switched from empty named volume to bind mounts for config files (consistent with dev).
+- **CD pipeline**: Trigger on `push` (parallel with CI), removed `environment: production` (was causing silent abort).
+- **CI pipeline**: Removed redundant `release` job (handled by `release.yml`).
+- **Tag format**: Standardized on `*.*.*` (e.g. `1.0.9`), removed `v` prefix from existing tags.
+- **DEPLOYMENT.md**: Documented parallel CI/CD pipeline flow with workflow table.
 
 ### Removed
 
@@ -154,7 +158,7 @@ Full backend and frontend implementation complete.
 - **Frontend** (`frontend/`): Vite + TypeScript + Tailwind + Alpine.js, HLS player with hls.js, chat sidebar with room switching and private messaging, "Now Playing" overlay, and modern UI (ADR-002, ADR-003).
 - Complete `docker-compose.yml` for local development with all services, volumes, and healthchecks.
 - All ADRs (001-007) created and linked in documentation.
-- `TODO.md`, `DONE.md`, and `CHANGELOG.md` updated with full traceability.
+- `CHANGELOG.md` updated with full traceability.
 - Git repository initialized with comprehensive initial commit.
 
 The project is a fully functional, self-hosted 24/7 linear video channel with synchronized playback, custom chat, R2 delivery, moderation, and admin-ready structure. It matches the architecture defined in the arc42 template and all ADRs.