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

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

@@ -1,11 +1,4 @@
-import {
-  IsString,
-  Matches,
-  MinLength,
-  IsOptional,
-  IsUrl,
-  IsEmail,
-} from 'class-validator';
+import { IsString, Matches, MinLength, IsOptional, IsUrl, IsEmail } from 'class-validator';
 import { ApiProperty } from '@nestjs/swagger';
 
 export class CreateDepartmentDto {

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

@@ -58,8 +58,7 @@ export class DepartmentStatsDto {
 
   constructor() {
     if (this.totalApplicants > 0) {
-      this.issueRate =
-        (this.totalCredentialsIssued / this.totalApplicants) * 100;
+      this.issueRate = (this.totalCredentialsIssued / this.totalApplicants) * 100;
     }
   }
 }

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

@@ -1,13 +1,6 @@
 import { PartialType } from '@nestjs/swagger';
 import { CreateDepartmentDto } from './create-department.dto';
-import {
-  IsString,
-  Matches,
-  MinLength,
-  IsOptional,
-  IsUrl,
-  IsEmail,
-} from 'class-validator';
+import { IsString, Matches, MinLength, IsOptional, IsUrl, IsEmail } from 'class-validator';
 import { ApiProperty } from '@nestjs/swagger';
 
 export class UpdateDepartmentDto extends PartialType(CreateDepartmentDto) {