test(unraid): preserve degraded runtime evidence

servers/unraid/tail2-pose-server/app/tail2/validate_runtime.py

@@ -18,8 +18,13 @@ def get(path):
 
 health = get("/v1/health")
 capabilities = get("/v1/capabilities")
-with connect("ws://127.0.0.1:18120/v1/poses", additional_headers=headers, open_timeout=10) as ws:
-    messages = [json.loads(ws.recv(timeout=20)) for _ in range(10)]
+messages = []
+ws_error = None
+try:
+    with connect("ws://127.0.0.1:18120/v1/poses", additional_headers=headers, open_timeout=10) as ws:
+        messages = [json.loads(ws.recv(timeout=20)) for _ in range(10)]
+except Exception as exc:
+    ws_error = type(exc).__name__ + ": " + str(exc)[:240]
 
 frame_ids = [m["frame_id"] for m in messages]
 summary = {
@@ -28,6 +33,7 @@ summary = {
     "capabilities": capabilities,
     "websocket": {
         "messages": len(messages),
+        "error": ws_error,
         "frame_ids": frame_ids,
         "strictly_increasing": all(b > a for a, b in zip(frame_ids, frame_ids[1:])),
         "source_alive_all": all(m["source_alive"] for m in messages),
@@ -38,4 +44,3 @@ summary = {
     },
 }
 print(json.dumps(summary, ensure_ascii=False, indent=2))
-