refactor: remove unused DTOs, interfaces, and test files to streamline the codebase

Author: Artuomka

backend/knip.json

@@ -4,6 +4,6 @@
     "interface": true,
     "type": true
   },
-  "ignore": ["src/migrations/**"],
+  "ignore": ["src/migrations/**", "src/shared/config/datasource.config.ts", "src/enums/widget-type.enum.ts"],
   "tags": ["-lintignore"]
 }

backend/src/authorization/index.ts

@@ -1,3 +1,3 @@
 export { AuthMiddleware } from './auth.middleware.js';
 export { BasicAuthMiddleware } from './basic-auth.middleware.js';
-export { IRequestWithCognitoInfo, ICognitoDecodedData } from './cognito-decoded.interface.js';
+export { IRequestWithCognitoInfo } from './cognito-decoded.interface.js';

backend/src/entities/ai/application/data-structures/request-info-from-table.ds.ts

@@ -1,5 +1,5 @@
 import { Response } from 'express';
-export class RequestInfoFromTableDS {
+class RequestInfoFromTableDS {
   connectionId: string;
   tableName: string;
   user_message: string;

backend/src/entities/connection-properties/dto/index.ts

@@ -1,2 +1 @@
 export { CreateConnectionPropertiesDto } from './create-connection-properties.dto.js';
-export { UpdateConnectionPropertiesDto } from './update-connection-properties.dto.js';