fix: defer embedding work during gcp backoff

tests/test_ai_insight_embedding_bridge.py

@@ -100,6 +100,62 @@ def test_process_one_embedding_writes_signature(monkeypatch):
     assert target_updates[0][1]["sig"] == get_embedding_signature(model="bge-m3:latest", dim=1024)
 
 
+def test_process_one_embedding_defers_without_attempt_when_gcp_circuit_open(monkeypatch):
+    import services.openclaw_learning_service as learning
+
+    executed = []
+
+    class Session:
+        def execute(self, stmt, params=None):
+            executed.append((str(stmt), params or {}))
+
+        def commit(self):
+            pass
+
+        def rollback(self):
+            pass
+
+        def close(self):
+            pass
+
+    monkeypatch.setattr(learning, "get_session", lambda: Session())
+    monkeypatch.setattr(
+        learning.ollama_service,
+        "generate_embedding",
+        lambda text, model="bge-m3:latest", **_kwargs: [],
+    )
+    monkeypatch.setattr(learning, "is_embedding_gcp_circuit_open", lambda: True)
+    monkeypatch.setattr(learning, "embedding_gcp_circuit_remaining_seconds", lambda: 42.0)
+
+    ok = learning._process_one_embedding(
+        row_id=7,
+        target_table="learning_episodes",
+        target_id=42,
+        text_content="測試內容",
+        model="bge-m3:latest",
+    )
+
+    assert ok is False
+    assert not any("attempts = attempts + 1" in stmt for stmt, _ in executed)
+    defer_updates = [item for item in executed if "SET status='pending'" in item[0]]
+    assert defer_updates
+    assert "不扣 attempts" in defer_updates[0][1]["err"]
+
+
+def test_claim_pending_embeddings_pauses_when_gcp_circuit_open(monkeypatch):
+    import services.openclaw_learning_service as learning
+
+    monkeypatch.setattr(learning, "is_embedding_gcp_circuit_open", lambda: True)
+    monkeypatch.setattr(learning, "embedding_gcp_circuit_remaining_seconds", lambda: 30.0)
+    monkeypatch.setattr(
+        learning,
+        "get_session",
+        lambda: (_ for _ in ()).throw(AssertionError("熔斷中不應 claim DB rows")),
+    )
+
+    assert learning._claim_pending_embeddings(limit=3, max_attempts=5) == []
+
+
 def test_claim_pending_embeddings_uses_skip_locked(monkeypatch):
     import services.openclaw_learning_service as learning
 

tests/test_ollama_retry_chain.py

@@ -482,6 +482,8 @@ def test_embedding_fallback_disabled_opens_short_gcp_failure_circuit():
     assert second == []
     assert posted_hosts == [oss.OLLAMA_HOST_PRIMARY, oss.OLLAMA_HOST_SECONDARY]
     assert oss._embedding_gcp_failure_circuit['blocked_until'] > 0
+    assert oss.is_embedding_gcp_circuit_open() is True
+    assert oss.embedding_gcp_circuit_remaining_seconds() > 0
 
 
 def test_embedding_health_label_maps_direct_and_proxy_gcp_hosts():