Manager-first deployment model: split runner, merge service/job, frontend→static

Replace the conflated `runner` axis with two orthogonal ones: `manager`
(systemd|caddy|path|none) — who supervises/realizes a deployment — and, for
systemd only, a nested `launcher` (python|command|container|compose|node) — how
the process starts. ServiceSpec and JobSpec collapse into one manager-
discriminated DeploymentSpec union (Systemd/Caddy/Path/Remote); the services/
and jobs/ config dirs collapse into one deployments/ dir. The human "kind"
(service|job|tool|static|reference) is fully derived (kind_for), never stored —
the frontend kind is renamed static. behavior is gone.

- core: DeploymentSpec union + LaunchSpec + kind_for; legacy-aware loader
  normalizes old runner shapes; CastleConfig.deployments with derived
  services/jobs/tools views; registry.Deployment carries manager/launcher/kind.
- cli: service/job/tool as filtered views + a deployment group; --behavior→--kind,
  create --runner→--launcher; lifecycle dispatches over config.deployments.
- castle-api: /deployments primary with /services,/jobs as views; summaries
  derive kind; PUT/DELETE /config/deployments/{name} (services/jobs aliased).
- app: KindBadge, frontend→static everywhere, pick-a-kind creation wizard,
  per-kind config editors.
- docs: single deployments/ layout, manager/launcher, static kind throughout.

Live migration verified byte-identical: regenerated Caddyfile and every unit
ExecStart line unchanged, so nothing restarted. Suites: core 124, cli 25,
castle-api 55; dashboard build + type-check clean.

castle-api/src/castle_api/mqtt_client.py

@@ -43,8 +43,9 @@ def _registry_to_json(registry: NodeRegistry) -> str:
 
     for name, comp in registry.deployed.items():
         entry: dict = {
-            "runner": comp.runner,
-            "behavior": comp.behavior,
+            "manager": comp.manager,
+            "launcher": comp.launcher,
+            "kind": comp.kind,
         }
         if comp.stack:
             entry["stack"] = comp.stack
@@ -77,11 +78,12 @@ def _json_to_registry(payload: str) -> NodeRegistry:
     deployed: dict[str, Deployment] = {}
     for name, comp_data in data.get("deployed", {}).items():
         deployed[name] = Deployment(
-            runner=comp_data.get("runner", "command"),
+            manager=comp_data.get("manager", "systemd"),
+            launcher=comp_data.get("launcher"),
             run_cmd=comp_data.get("run_cmd", []),
             env=comp_data.get("env", {}),
             description=comp_data.get("description"),
-            behavior=comp_data.get("behavior", "daemon"),
+            kind=comp_data.get("kind", "service"),
             stack=comp_data.get("stack"),
             port=comp_data.get("port"),
             health_path=comp_data.get("health_path"),