fix: code review cleanup

- Replace all 'any' types with proper Prisma types
- Fix exactOptionalPropertyTypes compatibility
- Export AuthUser type from better-auth-request.interface
- Remove duplicate empty migration folder
- Ensure proper JSON handling with Prisma.InputJsonValue

All agent-tasks tests passing (18/18)

apps/api/src/agent-tasks/agent-tasks.controller.ts

@@ -19,6 +19,7 @@ import { AuthGuard } from "../auth/guards/auth.guard";
 import { WorkspaceGuard, PermissionGuard } from "../common/guards";
 import { Workspace, Permission, RequirePermission } from "../common/decorators";
 import { CurrentUser } from "../auth/decorators/current-user.decorator";
+import type { AuthUser } from "../auth/types/better-auth-request.interface";
 
 /**
  * Controller for agent task endpoints
@@ -44,7 +45,7 @@ export class AgentTasksController {
   async create(
     @Body() createAgentTaskDto: CreateAgentTaskDto,
     @Workspace() workspaceId: string,
-    @CurrentUser() user: any
+    @CurrentUser() user: AuthUser
   ) {
     return this.agentTasksService.create(
       workspaceId,