Remove deprecated entries from Makefile and update documentation

🗑️ Removed:
- Legacy Support section with deprecated targets (k8s-deploy, k8s-undeploy, deploy, undeploy)
- 18 lines of deprecated makefile targets and warnings

📚 Documentation Updates:
- README.md: Updated Kubernetes deployment commands and project structure
- KUSTOMIZE_MIGRATION.md: Replaced deprecated commands with current ones
- k8s-kustomize/README.md: Updated deployment command references
- APP_NAME_CONFIGURATION.md: Updated deployment example command
- config/README.md: Replaced migration script references with config generation
- ARCHITECTURE_MIGRATION.md: Updated to reflect completed migration status
- PROJECT_STRUCTURE.md: Updated services structure to show unified database service
- IMPLEMENTATION_SUMMARY.md: Updated legacy compatibility notes

✨ Improvements:
- Clean Makefile with only current, supported targets
- Consistent documentation referring to current command structure
- Removed all references to deleted CouchDB service files
- Updated project structure diagrams to reflect current architecture

🧪 Verification:
- All 292 unit tests passing
- Integration tests passing
- Makefile help command displays cleanly
- No deprecated command references remain in documentation

docs/architecture/PROJECT_STRUCTURE.md

@@ -80,9 +80,11 @@ rxminder/
 │       └── 🎨 Icons.tsx            # All icon definitions
 │
 ├── 📁 services/                    # Business logic & APIs
-│   ├── 🗄️ couchdb.ts              # Mock database service
-│   ├── 🗄️ couchdb.production.ts   # Real CouchDB service
-│   ├── 🏭 couchdb.factory.ts      # Service factory
+│   ├── 🗄️ database/               # Unified database service
+│   │   ├── DatabaseService.ts     # Main service with strategy pattern
+│   │   ├── MockDatabaseStrategy.ts # In-memory implementation
+│   │   ├── ProductionDatabaseStrategy.ts # CouchDB implementation
+│   │   └── types.ts               # Database interfaces
 │   ├── 📧 email.ts                 # Email utilities
 │   ├── 📧 mailgun.service.ts      # Email delivery
 │   ├── 📧 mailgun.config.ts       # Email configuration