fix(07): DKV/Settings module wiring and missing cron dep

- Add `cron@4.4.0` as direct dep (pnpm strict isolation blocks transitive access)
- Import SettingsModule in DkvModule so DkvMailService can inject SettingsService
- Fix dkv.service.ts return key: `count` → `imported` to match declared return type

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/api/src/dkv/dkv.module.ts

@@ -2,6 +2,7 @@ import { Logger, Module, OnModuleInit } from '@nestjs/common';
 import { ModuleRegistryModule } from '../module-registry/module-registry.module';
 import { ModuleRegistryService } from '../module-registry/module-registry.service';
 import { CalendarModule } from '../calendar/calendar.module';
+import { SettingsModule } from '../settings/settings.module';
 import { DkvController } from './dkv.controller';
 import { DkvExportService } from './dkv-export.service';
 import { DkvMailService } from './dkv-mail.service';
@@ -30,7 +31,7 @@ import { seedDkvModule } from './dkv.seed';
  *
  * PrismaModule is global (no explicit import needed).
  * ScheduleModule.forRoot() was registered in AppModule by Plan 01.
- * SettingsModule (for DkvMailService → SettingsService) is imported in AppModule.
+ * - SettingsModule: exports SettingsService for DkvMailService (SMTP config at send time)
  *
  * Seeds itself into the module registry on application startup via
  * OnModuleInit lifecycle hook — same pattern as DomaincheckModule.
@@ -38,7 +39,8 @@ import { seedDkvModule } from './dkv.seed';
 @Module({
   imports: [
     ModuleRegistryModule,
-    CalendarModule, // Provides CalendarCryptoService for inbox credential encryption
+    CalendarModule,
+    SettingsModule,
   ],
   controllers: [DkvController],
   providers: [

apps/api/src/dkv/dkv.service.ts

@@ -498,7 +498,7 @@ export class DkvService {
     }
 
     this.logger.log(`DKV CSV import: ${vehicles.length} vehicles, mode=${mode}, tenant=${tenantId}`);
-    return { count: vehicles.length, mode };
+    return { imported: vehicles.length, mode };
   }
 
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