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

container-architecture.mermaid

@@ -0,0 +1,64 @@
+graph TB
+    subgraph Client["Client Layer"]
+        WEB["🌐 Next.js 14 Frontend<br/>shadcn/ui<br/>Port: 3000"]
+    end
+
+    subgraph API["API & Backend Layer"]
+        APIGW["📡 API Gateway<br/>NestJS<br/>Port: 3001"]
+        AUTH["🔐 Auth Service<br/>API Key + Secret<br/>(POC)"]
+        WORKFLOW["⚙️ Workflow Service<br/>NestJS Module"]
+        APPROVAL["✅ Approval Service<br/>NestJS Module"]
+        DOCUMENT["📄 Document Service<br/>NestJS Module"]
+    end
+
+    subgraph Data["Data Layer"]
+        DB["🗄️ PostgreSQL<br/>Port: 5432<br/>license_requests<br/>approvals, documents<br/>audit_logs"]
+        CACHE["⚡ Redis Cache<br/>Port: 6379<br/>Session, Workflow State"]
+        STORAGE["📦 MinIO<br/>Port: 9000<br/>Document Files<br/>License PDFs"]
+    end
+
+    subgraph Blockchain["Blockchain Layer"]
+        BESU["⛓️ Hyperledger Besu<br/>QBFT Consensus<br/>Port: 8545"]
+        CONTRACTS["📋 Smart Contracts<br/>• LicenseRequestNFT<br/>• ApprovalManager<br/>• DepartmentRegistry<br/>• WorkflowRegistry"]
+        BCDB["📚 Chain State<br/>Account Balances<br/>NFT Metadata"]
+    end
+
+    subgraph Integrations["External Integrations"]
+        DIGILOCKER["📱 DigiLocker Mock<br/>Document Verification"]
+        LEGACY["💼 Legacy Systems<br/>Data Integration"]
+        WEBHOOK["🔔 Webhook Service<br/>Event Notifications"]
+    end
+
+    WEB -->|REST/GraphQL| APIGW
+    APIGW -->|Validate Token| AUTH
+    APIGW -->|Route Request| WORKFLOW
+    APIGW -->|Route Request| APPROVAL
+    APIGW -->|Route Request| DOCUMENT
+
+    WORKFLOW -->|Read/Write| DB
+    WORKFLOW -->|Cache State| CACHE
+    WORKFLOW -->|Submit TX| BESU
+
+    APPROVAL -->|Read/Write| DB
+    APPROVAL -->|Cache| CACHE
+    APPROVAL -->|Smart Contract Call| BESU
+
+    DOCUMENT -->|Store Files| STORAGE
+    DOCUMENT -->|Hash Generation| DOCUMENT
+    DOCUMENT -->|Record Hash| BESU
+
+    BESU -->|Execute| CONTRACTS
+    CONTRACTS -->|Update State| BCDB
+
+    APIGW -->|Verify Docs| DIGILOCKER
+    APIGW -->|Query Legacy| LEGACY
+    APPROVAL -->|Send Event| WEBHOOK
+
+    style WEB fill:#10b981,stroke:#059669,stroke-width:2px,color:#fff
+    style APIGW fill:#3b82f6,stroke:#1e40af,stroke-width:2px,color:#fff
+    style AUTH fill:#f59e0b,stroke:#d97706,stroke-width:2px,color:#fff
+    style DB fill:#8b5cf6,stroke:#6d28d9,stroke-width:2px,color:#fff
+    style STORAGE fill:#ec4899,stroke:#be123c,stroke-width:2px,color:#fff
+    style CACHE fill:#06b6d4,stroke:#0891b2,stroke-width:2px,color:#fff
+    style BESU fill:#ef4444,stroke:#991b1b,stroke-width:2px,color:#fff
+    style CONTRACTS fill:#dc2626,stroke:#7f1d1d,stroke-width:2px,color:#fff