ci: align deployment on Kuby (Docker + rsync + SSH key + healthcheck + rollback)

- Add HTTP /health endpoint (aiohttp) for Docker healthcheck + post-deploy check
- Dockerfile HEALTHCHECK hits /health; docker-compose exposes 1890, container vision-bot
- scripts/deploy_runner.sh runs on .117 (docker compose build/restart)
- .forgejo/workflows/deploy.yml: single job on omhk-deploy runner (clone, syntax test,
  rsync, deploy, health check, auto-rollback) like Kuby
- .forgejo/workflows/ci.yml: single job (ruff + pytest) on dev/PR

config.py

@@ -15,6 +15,7 @@ LOGS_DIR.mkdir(exist_ok=True)
 DISCORD_TOKEN = os.getenv("DISCORD_TOKEN", "")
 APPLICATION_ID = os.getenv("APPLICATION_ID", "")
 DEV = os.getenv("DEV", "").strip() in ("1", "true", "yes")
+HEALTH_PORT = int(os.getenv("HEALTH_PORT", "1890"))
 
 FORGEJO_URL = os.getenv("FORGEJO_URL", "")
 FORGEJO_TOKEN = os.getenv("FORGEJO_TOKEN", "")