debt(pre-router): resolved most of the technical debt that was noted while finishing epic-12 and epic-13.

core/kernel/src/main/kotlin/com/correx/core/kernel/orchestration/ApprovalGateway.kt

@@ -0,0 +1,8 @@
+package com.correx.core.kernel.orchestration
+
+import com.correx.core.approvals.model.ApprovalDecision
+import com.correx.core.events.types.ApprovalRequestId
+
+interface ApprovalGateway {
+    fun submitApprovalDecision(requestId: ApprovalRequestId, decision: ApprovalDecision)
+}

core/kernel/src/main/kotlin/com/correx/core/kernel/orchestration/DefaultSessionOrchestrator.kt

@@ -22,7 +22,7 @@ class DefaultSessionOrchestrator(
     private val repositories: OrchestratorRepositories,
     engines: OrchestratorEngines,
     private val retryCoordinator: RetryCoordinator,
-) : SessionOrchestrator(repositories, engines) {
+) : SessionOrchestrator(repositories, engines), ApprovalGateway {
     override val cancellations: ConcurrentHashMap<SessionId, AtomicBoolean> =
         ConcurrentHashMap<SessionId, AtomicBoolean>()
 
@@ -82,7 +82,7 @@ class DefaultSessionOrchestrator(
         cancellations.getOrPut(sessionId) { AtomicBoolean(false) }.set(true)
     }
 
-    fun submitApprovalDecision(requestId: ApprovalRequestId, decision: ApprovalDecision) {
+    override fun submitApprovalDecision(requestId: ApprovalRequestId, decision: ApprovalDecision) {
         val deferred = pendingApprovals[requestId]
             ?: error("No pending approval for requestId ${requestId.value}")
         deferred.complete(decision)