refactor: remove deprecated AI use case and update related components

- Deleted the old `RequestInfoFromTableWithAIUseCaseV6` implementation.
- Introduced `RequestInfoFromTableWithAIUseCaseV7` with improved message handling and response processing.
- Updated `UserAIRequestsControllerV2` to remove references to older use cases and streamline AI request handling.
- Adjusted schema change AI loop to remove unnecessary configuration handling.
- Removed unused AI response entity from the user entity.
- Updated various test files to switch the default AI provider from OpenAI to Bedrock.
- Cleaned up package dependencies by removing unused OpenAI packages from `pnpm-lock.yaml`.

Author: Artuomka

backend/package.json

@@ -34,7 +34,6 @@
 		"@faker-js/faker": "^10.3.0",
 		"@langchain/aws": "^1.3.3",
 		"@langchain/core": "^1.1.33",
-		"@langchain/openai": "^1.3.0",
 		"@nestjs/common": "11.1.17",
 		"@nestjs/config": "4.0.3",
 		"@nestjs/core": "11.1.17",
@@ -82,7 +81,6 @@
 		"node-sql-parser": "^5.3.0",
 		"nodemailer": "^8.0.4",
 		"nunjucks": "^3.2.4",
-		"openai": "^6.32.0",
 		"otplib": "^12.0.1",
 		"p-queue": "9.1.0",
 		"pg": "^8.20.0",

backend/src/ai-core/ai-core.module.ts

@@ -1,21 +1,19 @@
 import { Global, Module } from '@nestjs/common';
 import { LangchainBedrockProvider } from './providers/langchain-bedrock.provider.js';
-import { LangchainOpenAIProvider } from './providers/langchain-openai.provider.js';
 import { AICoreService } from './services/ai-core.service.js';
 
 export const AI_CORE_SERVICE = 'AI_CORE_SERVICE';
 
 @Global()
 @Module({
 	providers: [
-		LangchainOpenAIProvider,
 		LangchainBedrockProvider,
 		AICoreService,
 		{
 			provide: AI_CORE_SERVICE,
 			useExisting: AICoreService,
 		},
 	],
-	exports: [AICoreService, AI_CORE_SERVICE, LangchainOpenAIProvider, LangchainBedrockProvider],
+	exports: [AICoreService, AI_CORE_SERVICE, LangchainBedrockProvider],
 })
 export class AICoreModule {}

backend/src/ai-core/interfaces/ai-provider.interface.ts

@@ -6,7 +6,6 @@ export interface AIProviderConfig {
 	temperature?: number;
 	maxTokens?: number;
 	streaming?: boolean;
-	previousResponseId?: string; // For conversation continuation (OpenAI Responses API)
 }
 
 export interface AIToolDefinition {

backend/src/ai-core/interfaces/ai-service.interface.ts

@@ -9,7 +9,6 @@ import {
 } from './ai-provider.interface.js';
 
 export enum AIProviderType {
-	OPENAI = 'openai',
 	BEDROCK = 'bedrock',
 }
 

backend/src/ai-core/providers/index.ts

@@ -1,2 +1 @@
 export * from './langchain-bedrock.provider.js';
-export * from './langchain-openai.provider.js';