fix(observability): avoid false stopped Flynn status outside systemd

src/gateway/handlers/observability.ts

@@ -130,6 +130,10 @@ interface SampleRecord {
   restartCount: number;
 }
 
+function isGatewayRunningUnderSystemd(): boolean {
+  return Boolean(process.env.INVOCATION_ID || process.env.JOURNAL_STREAM || process.env.SYSTEMD_EXEC_PID);
+}
+
 function defaultRunner(
   command: string,
   args: string[],
@@ -665,24 +669,28 @@ export class ObservabilityCollector {
     const snapshots: SourceSnapshot[] = [];
 
     const flynnMapped = mapSystemdStatus(flynnStatus.activeState, flynnStatus.error);
+    const fallbackToProcessRuntime = !isGatewayRunningUnderSystemd() && flynnMapped.status !== 'running';
+    const flynnStatusValue = fallbackToProcessRuntime ? 'running' : flynnMapped.status;
+    const flynnStateCode = fallbackToProcessRuntime ? STATE_RUNNING : flynnMapped.stateCode;
+    const flynnHealthCode = fallbackToProcessRuntime ? HEALTH_HEALTHY : flynnMapped.healthCode;
     snapshots.push({
       source: {
         id: 'systemd:flynn',
         name: 'Flynn daemon',
         kind: 'systemd_system',
         runtime: 'systemd_system',
-        status: flynnMapped.status,
+        status: flynnStatusValue,
         graphCapable: true,
-        logCapable: true,
+        logCapable: !fallbackToProcessRuntime,
         metadata: {
           unit: this.flynnSystemdUnit,
-          state: flynnStatus.activeState,
-          statusText: flynnStatus.statusText,
+          state: fallbackToProcessRuntime ? 'running' : flynnStatus.activeState,
+          statusText: fallbackToProcessRuntime ? 'running (gateway process)' : flynnStatus.statusText,
         },
       },
-      stateCode: flynnMapped.stateCode,
-      healthCode: flynnMapped.healthCode,
-      hasError: Boolean(flynnStatus.error),
+      stateCode: flynnStateCode,
+      healthCode: flynnHealthCode,
+      hasError: fallbackToProcessRuntime ? false : Boolean(flynnStatus.error),
       fingerprint: flynnStatus.pid ? `pid:${flynnStatus.pid}` : null,
     });