diff --git a/apps/api/src/tenders/tenders.module.ts b/apps/api/src/tenders/tenders.module.ts
index 207a510..c87d3bf 100644
--- a/apps/api/src/tenders/tenders.module.ts
+++ b/apps/api/src/tenders/tenders.module.ts
@@ -4,7 +4,9 @@ import { ModuleRegistryService } from '../module-registry/module-registry.servic
 import { PrismaService } from '../prisma/prisma.service';
 import { SettingsModule } from '../settings/settings.module';
 import { DoeOpenDataAdapter } from './adapters/doe-opendata.adapter';
+import { SourceRegistry } from './source-registry';
 import { seedTendersModule } from './tenders.seed';
+import { TenderDedupService } from './tender-dedup.service';
 import { TenderDigestScheduler } from './tender-digest.scheduler';
 import { TenderIngestionService } from './tender-ingestion.service';
 import { TenderMailService } from './tender-mail.service';
@@ -61,13 +63,27 @@ import { TendersController } from './tenders.controller';
  *
  * Seeds itself into the module registry on application startup via
  * OnModuleInit lifecycle hook — same pattern as DkvModule.
+ *
+ * Phase 13, Plan 03 (SCHEMA-03): adds `SourceRegistry` (fan-out lookup +
+ * INGEST-07 denylist gate, Plan 13-02) and `TenderDedupService`
+ * (three-tier cross-source dedup resolver, Plan 13-03 Task 1) as
+ * providers. `onModuleInit` registers every known source adapter with the
+ * registry via `SourceRegistry.register()` BEFORE the scheduler's first
+ * tick can run — this is the DI-boot-time hook where the denylist gate
+ * (D-06) structurally applies. `DoeOpenDataAdapter` is registered here;
+ * this is deliberately the ONE place that grows an additional
+ * `registry.register(...)` call as 13-04 (NetServer) and 13-05 (cosinex)
+ * add their adapters in later waves — this plan is Wave 2's sole writer
+ * of tenders.module.ts, so those additions are purely additive follow-ups.
  */
 @Module({
   imports: [ModuleRegistryModule, SettingsModule],
   controllers: [TendersController],
   providers: [
     DoeOpenDataAdapter,
+    SourceRegistry,
     TenderNormalizerService,
+    TenderDedupService,
     TenderIngestionService,
     TenderSchedulerService,
     TenderTriageService,
@@ -84,9 +100,27 @@ export class TendersModule implements OnModuleInit {
   constructor(
     private readonly moduleRegistryService: ModuleRegistryService,
     private readonly prisma: PrismaService,
+    private readonly sourceRegistry: SourceRegistry,
+    private readonly doeAdapter: DoeOpenDataAdapter,
   ) {}
 
   async onModuleInit(): Promise<void> {
+    try {
+      // D-06/INGEST-07: registration itself is the denylist-gate enforcement
+      // point — SourceRegistry.register() throws for any adapter serving a
+      // denylisted portal. DoeOpenDataAdapter is legitimate; this call is
+      // additive-only for 13-04/13-05's future adapters.
+      this.sourceRegistry.register(this.doeAdapter);
+      this.logger.log(
+        `Registered source adapters: ${this.sourceRegistry
+          .activeAdapters()
+          .map((a) => a.sourceType)
+          .join(', ')}`,
+      );
+    } catch (error) {
+      this.logger.error('Failed to register tender source adapters', error);
+    }
+
     try {
       await seedTendersModule(this.moduleRegistryService);
       this.logger.log('Ausschreibungs-Radar module seeded in registry');