Show all Docker containers as sub-services with active/inactive status

Agent changes:
- Use docker ps -a to show ALL containers (running and stopped)
- Map container status: Up -> active, Exited/Created -> inactive, other -> failed
- Display Docker containers as sub-services under the docker service
- Each container shown with proper status indicator

Example display:
● docker                 active     139M     1MB
  ├─ ● docker_gitea      active
  ├─ ○ docker_old-app    inactive
  └─ ● docker_immich     active

Updated to version 0.1.173

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.172"
+version = "0.1.173"
 edition = "2021"
 
 [dependencies]