alert history work

- dedup error handling
- alert now clears with observation_retenstion_seconds
- evaluate recent alerts once per server per 5s
- some iter stuff, some type stuff, and some store api stuff.

.sqlx/query-6ce45cc94cbfdd948aad5fb986f9b5976c79bb63759bc9ecff1a7873e2d70137.json

@@ -0,0 +1,12 @@
+{
+  "db_name": "SQLite",
+  "query": "INSERT INTO audit_events\n             (event_key, event_id, ts_unix, actor_type, actor_id, agent_id, request_id,\n              event_type, outcome, latency_ms, message, metadata_json)\n             VALUES (?1, ?2, ?3, 'test', NULL, NULL, NULL, 'test', 'ok', NULL, 'old', '{}')",
+  "describe": {
+    "columns": [],
+    "parameters": {
+      "Right": 3
+    },
+    "nullable": []
+  },
+  "hash": "6ce45cc94cbfdd948aad5fb986f9b5976c79bb63759bc9ecff1a7873e2d70137"
+}