fix(api): resolve 2 TypeScript compile errors

- Use bracket notation for process.env['BCRYPT_ROUNDS'] index signature access
- Remove redundant route? property from AuthenticatedRequest interface
  that conflicted with Express Request's required route property

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/modules/auth/domain/value-objects/hashed-password.vo.ts

@@ -7,7 +7,7 @@ interface HashedPasswordProps {
 
 export class HashedPassword extends ValueObject<HashedPasswordProps> {
   private static readonly SALT_ROUNDS = parseInt(
-    process.env.BCRYPT_ROUNDS ?? '12',
+    process.env['BCRYPT_ROUNDS'] ?? '12',
     10,
   );
   private static readonly MIN_LENGTH = 8;

apps/api/src/modules/shared/infrastructure/guards/endpoint-rate-limit.guard.ts

@@ -17,7 +17,6 @@ import { type RedisService } from '../redis.service';
 /** Express request extended with optional JWT user payload. */
 interface AuthenticatedRequest extends Request {
   user?: { sub: string; role: string };
-  route?: { path: string };
 }
 
 /**