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

blockchain/scripts/update-env.ts

@@ -0,0 +1,60 @@
+import * as fs from 'fs';
+import * as path from 'path';
+
+/**
+ * Updates the backend .env file with deployed contract addresses
+ */
+async function main() {
+  const deploymentPath = path.join(__dirname, '../deployments/deployment.json');
+
+  if (!fs.existsSync(deploymentPath)) {
+    console.error('Deployment file not found. Run deploy.ts first.');
+    process.exit(1);
+  }
+
+  const deployment = JSON.parse(fs.readFileSync(deploymentPath, 'utf8'));
+  const backendEnvPath = path.join(__dirname, '../../backend/.env');
+
+  if (!fs.existsSync(backendEnvPath)) {
+    console.error('Backend .env file not found at:', backendEnvPath);
+    process.exit(1);
+  }
+
+  let envContent = fs.readFileSync(backendEnvPath, 'utf8');
+
+  // Contract address mappings
+  const envUpdates: Record<string, string> = {
+    CONTRACT_ADDRESS_LICENSE_NFT: deployment.contracts.LicenseNFT,
+    CONTRACT_ADDRESS_APPROVAL_MANAGER: deployment.contracts.ApprovalManager,
+    CONTRACT_ADDRESS_DOCUMENT_CHAIN: deployment.contracts.DocumentChain,
+    CONTRACT_ADDRESS_WORKFLOW_REGISTRY: deployment.contracts.WorkflowRegistry,
+  };
+
+  // Update or append each variable
+  for (const [key, value] of Object.entries(envUpdates)) {
+    const regex = new RegExp(`^${key}=.*$`, 'm');
+
+    if (regex.test(envContent)) {
+      envContent = envContent.replace(regex, `${key}=${value}`);
+      console.log(`Updated ${key}`);
+    } else {
+      envContent += `\n${key}=${value}`;
+      console.log(`Added ${key}`);
+    }
+  }
+
+  fs.writeFileSync(backendEnvPath, envContent);
+  console.log('\nBackend .env file updated successfully!');
+  console.log('Updated contract addresses:');
+
+  for (const [key, value] of Object.entries(envUpdates)) {
+    console.log(`  ${key}=${value}`);
+  }
+}
+
+main()
+  .then(() => process.exit(0))
+  .catch((error) => {
+    console.error(error);
+    process.exit(1);
+  });