Pin backlog flow-rate fields in operator metrics contract

Pin backlog flow-rate fields in operator metrics contract

Author: durable-workflow-ops

tests/Feature/ControlPlaneOperationalSuccessContractTest.php

@@ -174,7 +174,17 @@ public static function operationalSuccessProvider(): array
                         'generated_at',
                         'runs',
                         'tasks',
-                        'backlog',
+                        'backlog' => [
+                            'runnable_tasks',
+                            'delayed_tasks',
+                            'leased_tasks',
+                            'tasks_added_last_minute',
+                            'tasks_dispatched_last_minute',
+                            'unhealthy_tasks',
+                            'repair_needed_runs',
+                            'claim_failed_runs',
+                            'compatibility_blocked_runs',
+                        ],
                         'repair',
                         'workers' => [
                             'required_compatibility',

tests/Feature/SystemOperatorMetricsTest.php

@@ -43,6 +43,8 @@ public function test_operator_metrics_returns_full_snapshot_with_rollout_safety_
         $response->assertOk()
             ->assertHeader(ControlPlaneProtocol::HEADER, ControlPlaneProtocol::VERSION)
             ->assertJsonPath('namespace', 'default')
+            ->assertJsonPath('operator_metrics.backlog.tasks_added_last_minute', 0)
+            ->assertJsonPath('operator_metrics.backlog.tasks_dispatched_last_minute', 0)
             ->assertJsonStructure([
                 'namespace',
                 'operator_metrics' => [
@@ -63,6 +65,8 @@ public function test_operator_metrics_returns_full_snapshot_with_rollout_safety_
                         'runnable_tasks',
                         'delayed_tasks',
                         'leased_tasks',
+                        'tasks_added_last_minute',
+                        'tasks_dispatched_last_minute',
                         'unhealthy_tasks',
                         'repair_needed_runs',
                         'claim_failed_runs',