feat(p9): thread purpose + persist consent receipt through OutboundService

Task S2.2: OutboundService.send gains an optional purpose, passes it to the broker,
and persists the returned consentReceiptRef on IiosOutboundCommand (new nullable
column, migration outbound-consent). RouteService.execute passes 'route_forward';
calendar reminders pass 'meeting_reminder'. CMP-DENY → command BLOCKED, no send.
2 tests: receipt recorded on allow, purpose-DENY blocks.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/iios-service/prisma/migrations/20260702155528_outbound_consent/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "IiosOutboundCommand" ADD COLUMN     "consentReceiptRef" TEXT;

packages/iios-service/prisma/schema.prisma

@@ -706,9 +706,10 @@ model IiosOutboundCommand {
   channelType    String
   target         String
   payload        Json
-  status         String                @default("PENDING") // PENDING | SENT | FAILED | RATE_LIMITED
+  status           String              @default("PENDING") // PENDING | SENT | FAILED | RATE_LIMITED | BLOCKED
   idempotencyKey   String              @unique
   providerRef      String?
+  consentReceiptRef String?            // CMP consent receipt this send went out under (P9)
   createdAt        DateTime            @default(now())
 
   attempts IiosDeliveryAttempt[]

packages/iios-service/src/adapters/adapters.spec.ts

@@ -115,4 +115,22 @@ describe('Adapter outbound (P5)', () => {
     expect(cmd.status).toBe('BLOCKED');
     expect(cmd.providerRef).toBe('blocked');
   });
+
+  it('CMP allow → command records the consent receipt (P9 slice 2)', async () => {
+    const ports = makeFakePorts();
+    ports.cmp.setStatus('ALLOW');
+    const svc = new OutboundService(asService, new CapabilityBroker(ports, new CapabilityProviderRegistry()));
+    const cmd = await svc.send('WEBHOOK', 'user@x', { text: 'hi' }, 'consent-1', 'scope1', 'support');
+    expect(cmd.status).toBe('SENT');
+    expect(cmd.consentReceiptRef).toBe('fake-receipt');
+  });
+
+  it('CMP DENY for the purpose → command BLOCKED, no send (P9 slice 2)', async () => {
+    const ports = makeFakePorts();
+    ports.cmp.denyPurpose('marketing');
+    const svc = new OutboundService(asService, new CapabilityBroker(ports, new CapabilityProviderRegistry()));
+    const cmd = await svc.send('WEBHOOK', 'user@x', { text: 'promo' }, 'consent-2', 'scope1', 'marketing');
+    expect(cmd.status).toBe('BLOCKED');
+    expect(await prisma.iiosDeliveryAttempt.count({ where: { commandId: cmd.id, status: 'SENT' } })).toBe(0);
+  });
 });

packages/iios-service/src/adapters/outbound.service.ts

@@ -27,6 +27,7 @@ export class OutboundService {
     payload: Record<string, unknown>,
     idempotencyKey: string = randomUUID(),
     scopeId?: string,
+    purpose?: string,
   ) {
     const existing = await this.prisma.iiosOutboundCommand.findUnique({ where: { idempotencyKey } });
     if (existing) return existing;
@@ -45,7 +46,7 @@ export class OutboundService {
 
     let result;
     try {
-      result = await this.broker.invoke({ capability: 'channel.send', channelType, target, payload, idempotencyKey, scopeId });
+      result = await this.broker.invoke({ capability: 'channel.send', channelType, target, payload, idempotencyKey, scopeId, purpose });
     } catch (err) {
       // Fail-closed (e.g. PolicyDeniedError): mark the command FAILED, record the attempt, propagate.
       await this.prisma.$transaction([
@@ -56,7 +57,10 @@ export class OutboundService {
     }
 
     const [updated] = await this.prisma.$transaction([
-      this.prisma.iiosOutboundCommand.update({ where: { id: cmd.id }, data: { status: result.outcome, providerRef: result.providerRef } }),
+      this.prisma.iiosOutboundCommand.update({
+        where: { id: cmd.id },
+        data: { status: result.outcome, providerRef: result.providerRef, consentReceiptRef: result.consentReceiptRef },
+      }),
       this.prisma.iiosDeliveryAttempt.create({
         data: { commandId: cmd.id, attemptNo: 1, status: result.outcome, providerRef: result.providerRef, latencyMs: result.latencyMs, errorCode: result.errorCode },
       }),

packages/iios-service/src/calendar/calendar.service.ts

@@ -178,6 +178,8 @@ export class CalendarService {
       `meeting:${meeting.id}`,
       { text: `Reminder: "${meeting.title}"` },
       `meeting-reminder:${meeting.id}`,
+      meeting.scopeId,
+      'meeting_reminder',
     );
     for (const p of meeting.participants) {
       if (!p.actorRefId) continue;

packages/iios-service/src/routing/route.service.ts

@@ -87,6 +87,8 @@ export class RouteService {
       binding.destinationRef ?? 'default',
       { text: preview.text ?? '' },
       `route:${decision.id}`,
+      binding.scopeId,
+      'route_forward',
     );
     await this.prisma.iiosRouteDecision.update({ where: { id: decision.id }, data: { executed: true, executedCommandId: cmd.id } });
   }