feat: Goa GEL Blockchain e-Licensing Platform - Full Stack Implementation

Complete implementation of the Goa Government e-Licensing platform with:

Backend:
- NestJS API with JWT authentication
- PostgreSQL database with Knex ORM
- Redis caching and session management
- MinIO document storage
- Hyperledger Besu blockchain integration
- Multi-department workflow system
- Comprehensive API tests (266/282 passing)

Frontend:
- Angular 21 with standalone components
- Angular Material + TailwindCSS UI
- Visual workflow builder
- Document upload with progress tracking
- Blockchain explorer integration
- Role-based dashboards (Admin, Department, Citizen)
- E2E tests with Playwright (37 tests)

Infrastructure:
- Docker Compose orchestration
- Blockscout blockchain explorer
- Development and production configurations

backend/src/modules/departments/dto/update-department.dto.ts

@@ -0,0 +1,42 @@
+import { PartialType } from '@nestjs/swagger';
+import { CreateDepartmentDto } from './create-department.dto';
+import {
+  IsString,
+  Matches,
+  MinLength,
+  IsOptional,
+  IsUrl,
+  IsEmail,
+} from 'class-validator';
+import { ApiProperty } from '@nestjs/swagger';
+
+export class UpdateDepartmentDto extends PartialType(CreateDepartmentDto) {
+  @IsOptional()
+  @IsString()
+  @Matches(/^[A-Z_]+$/, {
+    message: 'Department code must contain only uppercase letters and underscores',
+  })
+  @MinLength(3)
+  code?: string;
+
+  @IsOptional()
+  @IsString()
+  @MinLength(3)
+  name?: string;
+
+  @IsOptional()
+  @IsString()
+  description?: string;
+
+  @IsOptional()
+  @IsEmail()
+  contactEmail?: string;
+
+  @IsOptional()
+  @IsString()
+  contactPhone?: string;
+
+  @IsOptional()
+  @IsUrl()
+  webhookUrl?: string;
+}