feat(monitor): store nginx telemetry for generic clients

- accept nginx installation status and sites-enabled list
- persist nginx fields in server state
- expose nginx data in monitor overview/admin views
- auto-migrate new server_states columns on startup

app/api/routers/monitor.py

@@ -180,6 +180,8 @@ class ServerHeartbeat(BaseModel):
     openclaw_version: str | None = None
     plugin_version: str | None = None
     agents: List[dict] = []
+    nginx_installed: bool | None = None
+    nginx_sites: List[str] = []
     cpu_pct: float | None = None
     mem_pct: float | None = None
     disk_pct: float | None = None
@@ -198,6 +200,8 @@ def server_heartbeat(payload: ServerHeartbeat, db: Session = Depends(get_db)):
     st.openclaw_version = payload.openclaw_version
     st.plugin_version = payload.plugin_version
     st.agents_json = json.dumps(payload.agents, ensure_ascii=False)
+    st.nginx_installed = payload.nginx_installed
+    st.nginx_sites_json = json.dumps(payload.nginx_sites, ensure_ascii=False)
     st.cpu_pct = payload.cpu_pct
     st.mem_pct = payload.mem_pct
     st.disk_pct = payload.disk_pct
@@ -213,6 +217,8 @@ class TelemetryPayload(BaseModel):
     openclaw_version: str | None = None
     plugin_version: str | None = None
     agents: List[dict] = []
+    nginx_installed: bool | None = None
+    nginx_sites: List[str] = []
     cpu_pct: float | None = None
     mem_pct: float | None = None
     disk_pct: float | None = None
@@ -241,6 +247,8 @@ def server_heartbeat_v2(
     st.openclaw_version = payload.openclaw_version
     st.plugin_version = payload.plugin_version
     st.agents_json = json.dumps(payload.agents, ensure_ascii=False)
+    st.nginx_installed = payload.nginx_installed
+    st.nginx_sites_json = json.dumps(payload.nginx_sites, ensure_ascii=False)
     st.cpu_pct = payload.cpu_pct
     st.mem_pct = payload.mem_pct
     st.disk_pct = payload.disk_pct