feat: Runtime configuration and Docker deployment improvements

Frontend:
- Add runtime configuration service for deployment-time API URL injection
- Create docker-entrypoint.sh to generate config.json from environment variables
- Update ApiService, ApprovalService, and DocumentViewer to use RuntimeConfigService
- Add APP_INITIALIZER to load runtime config before app starts

Backend:
- Fix init-blockchain.js to properly quote mnemonic phrases in .env file
- Improve docker-entrypoint.sh with health checks and better error handling

Docker:
- Add API_BASE_URL environment variable to frontend container
- Update docker-compose.yml with clear documentation for remote deployment
- Reorganize .env.example with clear categories (REQUIRED FOR REMOTE, PRODUCTION, AUTO-GENERATED)

Workflow fixes:
- Fix DepartmentApproval interface to match backend schema
- Fix stage transformation for 0-indexed stageOrder
- Fix workflow list to show correct stage count from definition.stages

Cleanup:
- Move development artifacts to .trash directory
- Remove root-level package.json (was only for utility scripts)
- Add .trash/ to .gitignore

frontend/src/app/features/webhooks/webhook-list/webhook-list.component.ts

@@ -75,11 +75,11 @@ import { WebhookResponseDto } from '../../../api/models';
                 <th mat-header-cell *matHeaderCellDef>Events</th>
                 <td mat-cell *matCellDef="let row">
                   <div class="events-chips">
-                    @for (event of row.events.slice(0, 2); track event) {
+                    @for (event of (row.events || []).slice(0, 2); track event) {
                       <mat-chip>{{ formatEvent(event) }}</mat-chip>
                     }
-                    @if (row.events.length > 2) {
-                      <mat-chip>+{{ row.events.length - 2 }}</mat-chip>
+                    @if ((row.events?.length || 0) > 2) {
+                      <mat-chip>+{{ (row.events?.length || 0) - 2 }}</mat-chip>
                     }
                   </div>
                 </td>