feat(kernel): inject decision journal into stage context + wire repository

testing/integration/src/test/kotlin/ToolCallGateTest.kt

@@ -38,6 +38,9 @@ import com.correx.core.inference.ToolCallFunction
 import com.correx.core.inference.ToolCallRequest
 import com.correx.core.inference.TokenUsage
 import com.correx.core.kernel.orchestration.DefaultOrchestrationReducer
+import com.correx.core.journal.DecisionJournalProjector
+import com.correx.core.journal.DefaultDecisionJournalReducer
+import com.correx.core.journal.DefaultDecisionJournalRepository
 import com.correx.core.kernel.orchestration.DefaultSessionOrchestrator
 import com.correx.core.kernel.orchestration.OrchestrationConfig
 import com.correx.core.kernel.orchestration.OrchestrationProjector
@@ -220,11 +223,15 @@ class ToolCallGateTest {
             workspacePolicy = policy,
         )
 
+        val decisionJournalRepository = DefaultDecisionJournalRepository(
+            DefaultEventReplayer(eventStore, DecisionJournalProjector(DefaultDecisionJournalReducer())),
+        )
         val orchestrator = DefaultSessionOrchestrator(
             repositories = repositories,
             engines = engines,
             retryCoordinator = DefaultRetryCoordinator(eventStore),
             artifactStore = artifactStore,
+            decisionJournalRepository = decisionJournalRepository,
         )
 
         return Triple(orchestrator, eventStore, provider)