feat: add Docker healthchecks, remove Uptime Kuma

- Add healthcheck configurations to 13 stacks for Portainer status monitoring
- Remove Uptime Kuma service (replaced by Docker healthchecks)
- Clean up stale Heimdall references
- Update documentation and service counts

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Makefile

@@ -23,7 +23,7 @@ help:
 	@echo ""
 	@echo "Available Stacks:"
 	@echo "  - portainer, nginx-proxy-manager, ollama"
-	@echo "  - headscale, uptime-kuma, netdata, heimdall"
+	@echo "  - headscale, netdata"
 	@echo "  - watchtower, maintenance"
 	@echo "  - jellyfin, nextcloud, samba"
 	@echo ""
@@ -109,7 +109,7 @@ update-%:
 # Setup directories
 setup-dirs:
 	@echo "Creating directory structure..."
-	@mkdir -p ~/docker-data/{portainer,nginx-proxy-manager,ollama,headscale,uptime-kuma,netdata,heimdall,jellyfin,nextcloud,samba}
+	@mkdir -p ~/docker-data/{portainer,nginx-proxy-manager,ollama,headscale,netdata,jellyfin,nextcloud,samba}
 	@mkdir -p /mnt/media/{jellyfin,nextcloud,game-servers,backups,downloads}
 	@echo "✅ Directories created"
 	@echo ""
@@ -168,23 +168,13 @@ deploy-phase2:
 deploy-phase3:
 	@echo "=== Deploying Phase 3: Monitoring ==="
 	@echo ""
-	@echo "[1/3] Deploying Uptime Kuma..."
-	@make deploy-uptime-kuma
-	@sleep 3
-	@echo ""
-	@echo "[2/3] Deploying Netdata..."
+	@echo "Deploying Netdata..."
 	@make deploy-netdata
-	@sleep 3
-	@echo ""
-	@echo "[3/3] Deploying Heimdall..."
-	@make deploy-heimdall
 	@echo ""
 	@echo "=== Phase 3 Complete ==="
 	@echo ""
 	@echo "Access monitoring:"
-	@echo "  Uptime Kuma: http://localhost:3001"
 	@echo "  Netdata:     http://localhost:19999"
-	@echo "  Heimdall:    http://localhost:8888"
 
 # Quick deploy - Phase 4 optimization
 deploy-phase4: