keep discoverds fileds in separate sqlite

tests/test_monitor.py

@@ -163,6 +163,35 @@ class MonitorTests(unittest.TestCase):
             self.assertEqual(status["profile_suggestions"][0]["profile_advisor"]["status"], "heuristic")
             self.assertIn("timeout", status["profile_suggestions"][0]["profile_advisor"]["error"])
 
+    def test_profile_suggestions_use_cached_discovered_fields(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            history_path = str(Path(tmp) / "history.sqlite3")
+            incidents = str(Path(tmp) / "incidents.json")
+            first = Path(tmp) / "first.log"
+            first.write_text(
+                "\n".join(
+                    f"fgai_stream_id=app fgai_stream=App lcs_actor=user{index % 4} lcs_result=r{index % 3} action=ok"
+                    for index in range(1, 20)
+                ),
+                encoding="utf-8",
+            )
+            build_status(str(first), history_path=history_path, incident_path=incidents)
+            second = Path(tmp) / "second.log"
+            second.write_text(
+                "\n".join(
+                    f"fgai_stream_id=app fgai_stream=App action=ok"
+                    for _index in range(1, 5)
+                ),
+                encoding="utf-8",
+            )
+
+            status = build_status(str(second), history_path=history_path, incident_path=incidents)
+
+            suggestion = status["profile_suggestions"][0]
+            self.assertIn("lcs_actor", suggestion["entity_fields"])
+            self.assertIn("lcs_result", suggestion["categorical_fields"])
+            self.assertGreater(status["baseline"]["discovery_cache_events"], 0)
+
     def test_cached_status_with_error_keeps_last_good_dashboard_data(self):
         with tempfile.TemporaryDirectory() as tmp:
             cache_path = str(Path(tmp) / "status-cache.sqlite3")