fix(dashboard): add aggregated resource usage stats to the dashboard

- Aggregate CPU, memory, and network stats across all running containers
- Extend ISystemStatus.docker with resource usage fields
- Fix getContainerStats Swarm service ID fallback
- Wire dashboard resource usage card to real backend data

deno.json

@@ -1,6 +1,6 @@
 {
   "name": "@serve.zone/onebox",
-  "version": "1.19.0",
+  "version": "1.19.1",
   "exports": "./mod.ts",
   "tasks": {
     "test": "deno test --allow-all test/",