feat: add HWLAB fake echo provider

scripts/src/hwlab-node-help.ts

@@ -14,6 +14,7 @@ export function hwlabNodeHelp(): Record<string, unknown> {
       "bun scripts/cli.ts hwlab nodes control-plane status --node D601 --lane v03",
       "bun scripts/cli.ts hwlab nodes git-mirror status --node G14 --lane v03",
       "bun scripts/cli.ts hwlab nodes hwpod-preinstall plan --node D601 --lane v03 --dry-run",
+      "bun scripts/cli.ts hwlab nodes fake-model-provider plan --node D518 --lane v03 --provider fake-echo",
       "bun scripts/cli.ts hwlab nodes secret status --node G14 --lane v03 --name <secret>",
       "bun scripts/cli.ts hwlab nodes test-accounts status --node D601 --lane v03",
       "bun scripts/cli.ts hwlab nodes observability performance-summary --node D601 --lane v03",
@@ -23,6 +24,7 @@ export function hwlabNodeHelp(): Record<string, unknown> {
       "control-plane": "YAML-first node-local CI/CD, git-mirror, public exposure, runtime-image, Argo and PipelineRun operations.",
       "git-mirror": "Inspect or operate the selected node/lane source mirror.",
       "hwpod-preinstall": "Render YAML-first HWPOD preinstall configRefs, runtime mount targets, PM MDTODO source, and gateway profile status.",
+      "fake-model-provider": "Materialize and operate YAML-declared fake Responses model providers for HWLAB/AgentRun sentinel checks.",
       secret: "Inspect and sync YAML-declared runtime Secrets without printing secret values.",
       "test-accounts": "Prepare YAML-declared HWLAB admin/test account API keys with redacted sourceRef/fingerprint output.",
       observability: "Read runtime metrics and authenticated Web Performance summaries.",