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

infrastructure/src/main/kotlin/com/correx/infrastructure/InfrastructureModule.kt

@@ -3,6 +3,9 @@ package com.correx.infrastructure
 import com.correx.core.approvals.ApprovalProjector
 import com.correx.core.approvals.DefaultApprovalReducer
 import com.correx.core.approvals.DefaultApprovalRepository
+import com.correx.core.journal.DecisionJournalProjector
+import com.correx.core.journal.DefaultDecisionJournalReducer
+import com.correx.core.journal.DefaultDecisionJournalRepository
 import com.correx.core.artifacts.DefaultArtifactReducer
 import com.correx.core.artifacts.repository.ArtifactRepository
 import com.correx.core.artifactstore.ArtifactStore
@@ -177,6 +180,14 @@ object InfrastructureModule {
             ),
         )
 
+    fun createDecisionJournalRepository(eventStore: EventStore): DefaultDecisionJournalRepository =
+        DefaultDecisionJournalRepository(
+            DefaultEventReplayer(
+                eventStore,
+                DecisionJournalProjector(DefaultDecisionJournalReducer()),
+            ),
+        )
+
     fun createWorkflowLoader(extraKinds: List<ArtifactKind> = emptyList()): WorkflowLoader {
         val registry = DefaultArtifactKindRegistry()
         extraKinds.forEach { registry.register(it) }