Add daemon heartbeat capability registry (#77)

* Add daemon heartbeat capability registry

Co-authored-by: multica-agent <github@multica.ai>

* Fix daemon heartbeat CI feedback

Co-authored-by: multica-agent <github@multica.ai>

* Fix daemon node response ownership

Co-authored-by: multica-agent <github@multica.ai>

* Address daemon selection clippy warnings

Co-authored-by: multica-agent <github@multica.ai>

---------

Co-authored-by: Dimas <dimas@multica.local>
Co-authored-by: multica-agent <github@multica.ai>

Author: 3 people

.env.example

@@ -13,3 +13,4 @@ MIZAN_ADMIN_EMAIL=
 MIZAN_ADMIN_PASSWORD=
 MIZAN_ADMIN_ROLE=admin
 MIZAN_PROVIDER_SECRET_KEY=
+MIZAN_DAEMON_STALE_SECONDS=90

README.md

@@ -158,9 +158,13 @@ Minimal `mizan-daemon.toml`:
 control_plane_url = "http://127.0.0.1:18180"
 daemon_token_path = "/run/secrets/mizan-daemon-token"
 local_provider_url = "http://127.0.0.1:11434/v1"
+provider_family = "openai-compatible"
 advertised_models = ["llama3.1"]
 max_concurrency = 2
+region = "local"
+labels = ["gpu"]
 health_addr = "127.0.0.1:19180"
+heartbeat_interval_seconds = 30
 ```
 
 Run API, SQLite-backed storage, and Redis with Docker Compose: