v0.22.0:0 - configurable vllm port; gitea-release tooling; coexistence roadmap

- Configure Sparks gains a vLLM port field (blank => 8888, our launch-cluster.sh
  default); VLLM_PORT plumbed configureSparks -> sparkConfig.yaml -> main.ts env
  -> config.py. So an adopter whose vLLM listens elsewhere (e.g. 8000) can fix
  the "vLLM unreachable" health check without rebuilding the package.
- Harden numeric env parsing (config._env_int): a blank or malformed port now
  falls back to its default instead of crashing daemon startup (closes a P3
  tech-debt item; the Configure panel passes unset optional fields as "").
- Add scripts/gitea-release.sh + `make release` to publish the built s9pk to
  Gitea Releases, so the OpenClaw adopter pulls updates with a read-only token
  instead of being hand-sent the package.
- Capture the OpenClaw/Johnny-5 coexistence epic and the "control plane, not a
  job runner" stance in ROADMAP.md and Current state.

package/startos/actions/configureSparks.ts

@@ -40,6 +40,15 @@ const inputSpec = InputSpec.of({
     placeholder: 'your SSH username',
     masked: false,
   }),
+  vllm_port: Value.text({
+    name: 'vLLM port (optional)',
+    description:
+      "The port your vLLM server listens on, on Spark 1 — used by the health check and the chat proxy. Leave blank to use 8888, which is what the bundled launch-cluster.sh wrapper uses. Set this to 8000 (vLLM's own default) or another port if your vLLM listens elsewhere.",
+    required: false,
+    default: null,
+    placeholder: 'leave blank for 8888',
+    masked: false,
+  }),
   parakeet_host: Value.text({
     name: 'Parakeet host (optional)',
     description: