feat(#90): API Inscription AM - POST /auth/register/am

- DTO RegisterAMCompletDto (identité, photo, infos pro, CGU)
- Endpoint POST /auth/register/am + inscrireAMComplet() (transaction User + AssistanteMaternelle)
- Photo base64, token création MDP, consentement photo
- Suppression legacy: route register/parent/legacy, registerParent(), RegisterParentDto
- Frontend: ApiConfig.registerAM pour ticket #91

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/routes/auth/auth.module.ts

@@ -8,11 +8,12 @@ import { ConfigModule, ConfigService } from '@nestjs/config';
 import { Users } from 'src/entities/users.entity';
 import { Parents } from 'src/entities/parents.entity';
 import { Children } from 'src/entities/children.entity';
+import { AssistanteMaternelle } from 'src/entities/assistantes_maternelles.entity';
 import { AppConfigModule } from 'src/modules/config';
 
 @Module({
   imports: [
-    TypeOrmModule.forFeature([Users, Parents, Children]),
+    TypeOrmModule.forFeature([Users, Parents, Children, AssistanteMaternelle]),
     forwardRef(() => UserModule),
     AppConfigModule,
     JwtModule.registerAsync({