feat: live последние события на Dashboard; retention, health, runbook

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/tests/test_dashboard.py

@@ -90,3 +90,19 @@ def test_dashboard_summary_top_and_problems_24h(client, db_session, jwt_headers)
     types = {row["type"]: row["count"] for row in body["top_event_types"]}
     assert types["ssh.login.failed"] == 3
     assert types["agent.heartbeat"] == 2
+
+
+def test_dashboard_recent_events_ordered_by_received_at(client, db_session, jwt_headers):
+    h = _host(db_session, "live-host")
+    now = datetime.now(timezone.utc)
+    older = _event(db_session, h, "agent.lifecycle", received_at=now - timedelta(minutes=5))
+    newer = _event(db_session, h, "agent.heartbeat", received_at=now)
+    db_session.commit()
+
+    r = client.get("/api/v1/dashboards/recent-events?limit=8", headers=jwt_headers)
+    assert r.status_code == 200
+    rows = r.json()
+    assert len(rows) >= 2
+    assert rows[0]["id"] == newer.id
+    assert rows[0]["type"] == "agent.heartbeat"
+    assert rows[1]["id"] == older.id

backend/tests/test_retention.py

@@ -0,0 +1,78 @@
+"""Retention purge service."""
+
+import uuid
+from datetime import datetime, timedelta, timezone
+
+from app.config import Settings
+from app.models import Event, Host, Problem
+from app.services.retention import purge_old_data
+
+
+def _host(db, name: str) -> Host:
+    h = Host(
+        hostname=name,
+        os_family="linux",
+        product="ssh-monitor",
+        last_seen_at=datetime.now(timezone.utc),
+    )
+    db.add(h)
+    db.flush()
+    return h
+
+
+def test_purge_old_events_and_resolved_problems(db_session):
+    h = _host(db_session, "retention-host")
+    now = datetime.now(timezone.utc)
+    old_event = now - timedelta(days=120)
+    old_problem = now - timedelta(days=200)
+    _ev = Event(
+        event_id=str(uuid.uuid4()),
+        host_id=h.id,
+        occurred_at=old_event,
+        received_at=old_event,
+        category="agent",
+        type="agent.heartbeat",
+        severity="info",
+        title="old",
+        summary="s",
+        payload={},
+    )
+    db_session.add(_ev)
+    db_session.add(
+        Problem(
+            host_id=h.id,
+            title="resolved old",
+            summary="s",
+            severity="info",
+            status="resolved",
+            rule_id="rule:test",
+            fingerprint="fp-ret-old",
+            event_count=1,
+            last_seen_at=old_problem,
+            created_at=old_problem,
+            updated_at=old_problem,
+        )
+    )
+    db_session.add(
+        Problem(
+            host_id=h.id,
+            title="open stays",
+            summary="s",
+            severity="high",
+            status="open",
+            rule_id="rule:test",
+            fingerprint="fp-ret-open",
+            event_count=1,
+            last_seen_at=now,
+            created_at=now,
+            updated_at=now,
+        )
+    )
+    db_session.commit()
+
+    settings = Settings(sac_events_retention_days=90, sac_problems_retention_days=180)
+    stats = purge_old_data(db_session, settings)
+    assert stats["events_deleted"] == 1
+    assert stats["problems_deleted"] == 1
+    assert db_session.query(Event).count() == 0
+    assert db_session.query(Problem).filter(Problem.status == "open").count() == 1