chore: release v1.0.7

Playout: slate fallback, strict ffprobe validation, Prometheus metrics
Chat: history on join, DM offline delivery, env-config rate limits,
  Redis auto-reconnect, heartbeat, ban/mute enforcement, DM metrics
Viewer: presence indicators, schedule overlay, public /api/schedule
Admin: playlist drag-reorder, schedule overrides CRUD, user actions,
  inline mod buttons, CSV export, config editor, restart buttons,
  upload normalization gate, analytics time range
nginx: CORS preflight, JSON health, stub_status
Docs: test-lab vs production distinction across all configs/docs
Infra: Redis maxmemory, CD health IP-agnostic, slate volume mount

docs/architecture/README.md

@@ -284,7 +284,7 @@ Notable aspects: Manifest freshness ensures all viewers stay on same timeline; c
 
 ### CI/CD Pipeline Architecture
 
-The deployment follows a two-stage pipeline: **CI builds and pushes images**, then **CD pulls and deploys** them to the production host.
+The deployment follows a two-stage pipeline: **CI builds and pushes images**, then **CD pulls and deploys** them. Currently targeting the **test lab** (192.168.88.40). Production Hetzner VPS is planned but not yet provisioned — the same pipeline will deploy there by changing `DOCKER_HOST`.
 
 ```mermaid
 flowchart LR
@@ -295,7 +295,7 @@ flowchart LR
     subgraph "Gitea Container Registry"
         REGISTRY[git.allucanget.biz<br/>playout:latest<br/>chat:latest<br/>nginx:latest]
     end
-    subgraph "Production Host (192.168.88.40)"
+    subgraph "Test Lab Host (192.168.88.40) — Production Hetzner TBD"
         DOCKER[Docker Engine<br/>via TCP :2375]
         PLAYOUT[linearvoid-playout]
         CHAT[linearvoid-chat]
@@ -331,7 +331,7 @@ flowchart LR
    - Pulls latest images from registry
    - Generates `.env` from secrets
    - Seeds Prometheus config into named volume
-   - Deploys via `docker compose -f docker-compose.prod.yml up -d` to remote host (`192.168.88.40:2375`)
+   - Deploys via `docker compose -f docker-compose.prod.yml up -d` to remote host (`192.168.88.40:2375` — test lab; switch to Hetzner IP for production)
    - Runs health checks with retry logic for playout initialization
 
 ### Infrastructure Level 1
@@ -350,7 +350,7 @@ flowchart LR
 
 ### Infrastructure Level 2
 
-**Hetzner VPS**: Runs playout (FFmpeg/MediaMTX), chat backend, Nginx. Monitoring via dashboards + UptimeRobot. Backups to R2.
+**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.
 
 **Cloudflare Layer**: