refactor(cli): update API endpoints to v1 versioning and add dynamic port configuration to mock server

- Update mock-cli-server.py to use dynamic port allocation (8020-8050 range)
  - Add socket-based port availability checking
  - Generate dynamic config file at cli-dev/cli-staging-config-dynamic.yaml
  - Remove docstring header and shebang
  - Update endpoint paths: /v1/marketplace/gpus → /v1/marketplace/gpu/list, /v1/agent/workflows → /v1/agents/workflows

- Standardize all CLI command API

cli/aitbc_cli/commands/test_cli.py

@@ -66,7 +66,7 @@ def api(ctx, endpoint, method, data):
         import httpx
         
         # Prepare request
-        url = f"{config.coordinator_url.rstrip('/')}/api/v1/{endpoint.lstrip('/')}"
+        url = f"{config.coordinator_url.rstrip('/')}/{endpoint.lstrip('/')}"
         headers = {}
         if config.api_key:
             headers['Authorization'] = f"Bearer {config.api_key}"