release: nexus btpanel session fix and app-v2

tests/test_agent_heartbeat_ttl.py

@@ -0,0 +1,9 @@
+"""Agent heartbeat Redis TTL must outlive the MySQL flush interval."""
+
+from server.api.agent import REDIS_KEY_EXPIRE
+from server.background.heartbeat_flush import FLUSH_INTERVAL
+
+
+def test_heartbeat_redis_ttl_exceeds_flush_interval():
+    assert REDIS_KEY_EXPIRE > FLUSH_INTERVAL
+    assert REDIS_KEY_EXPIRE == int(FLUSH_INTERVAL * 1.5)