test: bump prefetch integration test budget to 30s with diagnostic

The 5s deadline was too tight for cold CI runners — prefetch's own
actor.call times out at 3.0s per attempt, so 5s allowed only 1-2
retries before the index caught up. Recent runs (CI #25759526012)
hit this and failed despite the production code being correct.

30s gives ~10 attempts and absorbs the worst observed cold-start
delay (BM MCP server + onnxruntime initialization + first-index
write). No production-path code changes — prefetch's own 3.0s
timeout stays as-is (it's sized for the hot path; the integration
test just needs a more generous outer budget).

Assertion now reports attempts, failure_count, and circuit state so
the next flake (if any) tells us whether BM didn't index in time vs
prefetch's actor calls are timing out internally — different fixes
in each case.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: groksrc

tests/test_integration.py

@@ -324,15 +324,27 @@ def test_prefetch_against_real_bm(provider, bm):
         "folder": "tests",
     })
 
-    # BM may need a beat to index the new note
-    deadline = time.monotonic() + 5.0
+    # BM may need time to index the new note. prefetch's own actor.call
+    # times out at 3.0s per attempt; on a cold CI runner (especially with
+    # onnxruntime startup), indexing latency plus a few retries can push
+    # well past the previous 5s budget. 30s gives ~10 attempts and absorbs
+    # the worst observed cold-start delays.
+    deadline = time.monotonic() + 30.0
     out = ""
+    attempts = 0
     while time.monotonic() < deadline:
+        attempts += 1
         out = provider.prefetch(unique)
         if out:
             break
         time.sleep(0.25)
 
-    assert out, "prefetch returned nothing — BM may not have indexed the new note"
+    assert out, (
+        f"prefetch returned nothing after {attempts} attempt(s) over "
+        f"{30.0}s; provider._failure_count={provider._failure_count}, "
+        f"circuit_open={provider._is_circuit_open()}. "
+        f"Either BM didn't index the note in time or prefetch's actor.call "
+        f"is timing out internally."
+    )
     assert "Basic Memory Recall" in out
     assert unique in out or "Prefetch Test" in out