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

docs/architecture/README.md

@@ -20,7 +20,14 @@
   - [Building Block View](#building-block-view)
     - [Whitebox Overall System](#whitebox-overall-system)
     - [Level 2](#level-2)
+      - [Playout Service (`backend/playout/src/playlist.go`)](#playout-service-backendplayoutsrcplaylistgo)
+      - [Chat Service (`backend/chat/src/main.go`)](#chat-service-backendchatsrcmaingo)
+      - [Frontend SPA (`frontend/`)](#frontend-spa-frontend)
+      - [Reverse Proxy (`infrastructure/nginx/nginx.conf`)](#reverse-proxy-infrastructurenginxnginxconf)
     - [Level 3](#level-3)
+      - [Chat Service Modules](#chat-service-modules)
+      - [Playout Service Modules](#playout-service-modules)
+      - [Frontend Modules](#frontend-modules)
   - [Runtime View](#runtime-view)
     - [Playout \& Delivery Scenario](#playout--delivery-scenario)
   - [Deployment View](#deployment-view)
@@ -453,7 +460,7 @@ flowchart LR
 
 ### Infrastructure Level 2
 
-**Hetzner VPS (planned):** Will run playout (FFmpeg/MediaMTX), chat backend, Nginx. Monitoring via dashboards + UptimeRobot. Backups to R2. Currently test lab (`192.168.88.40`) serves this role. Production Hetzner instance not yet provisioned — see `TODO.md` Production Deployment section.
+**Hetzner VPS (planned):** Will run playout (FFmpeg/MediaMTX), chat backend, Nginx. Monitoring via dashboards + UptimeRobot. Backups to R2. Currently test lab (`192.168.88.40`) serves this role. Production Hetzner instance not yet provisioned — see Production Deployment section in [`DEPLOYMENT.md`](../../DEPLOYMENT.md).
 
 **Cloudflare Layer**: