feat: release 2.2.0 with PC-only tests and execution reliability fixes

Unify task scheduling and queue state, fix Android input and observation recovery, preserve screenshot paths, and match final review criteria accurately. Add collapsible copyable results and publish the complete 2.1.0 upgrade notes. Validation: 3189 backend tests, 326 frontend tests, 24 client tests, production build and quality gates.

tests/unit/test_plugins.py

@@ -280,7 +280,7 @@ server.run()
 
 
 @pytest.mark.parametrize("scope", ["", "test-adb-endpoint"])
-def test_resource_lock_conflicts_across_devices_without_holding_partial_leases(
+def test_serial_resource_locks_across_devices_without_holding_partial_leases(
     tmp_path, monkeypatch, scope
 ):
     import artemis.runtime.device_lock as locks
@@ -304,16 +304,20 @@ def test_resource_lock_conflicts_across_devices_without_holding_partial_leases(
     try:
         with pytest.raises(DeviceBusyError):
             second.acquire(blocking=False)
-        other.acquire(blocking=False)
-        assert len(DeviceExecutionLock.get_active_owners()) == 2
-        assert DeviceExecutionLock.get_active_owners()["phone-a"].resource_ids == ("desktop:local",)
+        with pytest.raises(DeviceBusyError):
+            other.acquire(blocking=False)
+        assert len(DeviceExecutionLock.get_active_owners()) == 1
+        resources = (DeviceExecutionLock.EXECUTION_RESOURCE, "desktop:local")
+        assert DeviceExecutionLock.get_active_owners()["phone-a"].resource_ids == resources
         assert DeviceExecutionLock.annotate_active_owner(
             session_id="first", device_id="phone-a", ingress="test"
         )
-        assert DeviceExecutionLock.get_active_owners()["phone-a"].resource_ids == ("desktop:local",)
+        assert DeviceExecutionLock.get_active_owners()["phone-a"].resource_ids == resources
     finally:
         other.release()
         first.release()
+    other.acquire(blocking=False)
+    other.release()
     second.acquire(blocking=False)
     second.release()
     assert not DeviceExecutionLock.get_active_owners()
@@ -562,6 +566,7 @@ server.run()
         other.release()
         assert await asyncio.wait_for(future, timeout=15) == (True, None)
         assert DeviceExecutionLock.get_active_owners()["computer-a"].resource_ids == (
+            DeviceExecutionLock.EXECUTION_RESOURCE,
             "desktop:local",
         )
         result = await runtime.call(next(iter(runtime.bindings)), {})