feat: add global device queue and readiness tracking

tests/unit/admin_console/test_session_repository_liveness.py

@@ -0,0 +1,39 @@
+from unittest.mock import patch
+
+from apps.admin_console.database.connection import db_session
+from apps.admin_console.database.repositories.session_repository import SessionRepository
+
+
+def _insert_running_session(db_path, session_id, pid):
+    with db_session(db_path) as conn:
+        conn.execute(
+            "INSERT INTO sessions "
+            "(session_id, initial_goal, start_time, status, device_info, pid) "
+            "VALUES (?, ?, ?, ?, ?, ?)",
+            (session_id, session_id, 1.0, "running", "{}", pid),
+        )
+        conn.commit()
+
+
+def test_startup_cleanup_keeps_live_cross_process_session(tmp_path):
+    db_path = tmp_path / "sessions.db"
+    repository = SessionRepository(db_path)
+    _insert_running_session(db_path, "live", 111)
+    _insert_running_session(db_path, "dead", 222)
+
+    with patch.object(repository, "process_is_alive", side_effect=lambda pid: pid == 111):
+        assert repository.cleanup_orphans_on_startup() == 1
+
+    assert repository.get_session_status("live") == "running"
+    assert repository.get_session_status("dead") == "failed"
+
+
+def test_session_list_harvest_rechecks_worker_liveness(tmp_path):
+    db_path = tmp_path / "sessions.db"
+    repository = SessionRepository(db_path)
+    _insert_running_session(db_path, "external-live", 333)
+
+    with patch.object(repository, "process_is_alive", return_value=True):
+        assert repository.harvest_orphaned_sessions(["external-live"]) == 0
+
+    assert repository.get_session_status("external-live") == "running"