refactor: migrate all internal imports to package.json subpath aliases

- Add #domain, #protocol, #utils aliases to package.json imports map
- Replace all relative imports (./, ../, ../..) in app/ and
  database/mongo_migrations/ with the corresponding #alias imports,
  eliminating relative path traversal across the codebase
- Remove dead code: ConfigurationVersionModel.findByConfigurationIdentifier
  (unused, superseded by paginateVersions) and unused exception classes
  (NotFoundException, UnprocessableEntityException, DatabaseException)
  from app/exceptions/index.ts, keeping only BadRequestException
- Fix pre-existing syntax error in configuration_version.ts (mismatched
  parenthesis) that broke tsc
- Fix eqeqeq violation in configuration_service.ts and isNaN ->
  Number.isNaN in configuration_engine.ts / cwmp-1-0.ts / exchange_controller.ts
- Fix no-shadow violation in cwmp-1-0.ts EventStruct constructor
- Prettier formatting pass on touched files

Validated: tsc --noEmit clean, eslint app/ clean, full test suite green.

database/mongo_migrations/001_create_devices_collection.ts

@@ -1,4 +1,4 @@
-import { MongoMigration } from '../mongo_migrator.js'
+import { MongoMigration } from '#database/mongo_migrator'
 
 export default class CreateDevicesCollection extends MongoMigration {
   async up(): Promise<void> {

database/mongo_migrations/002_create_commands_collection.ts

@@ -1,4 +1,4 @@
-import { MongoMigration } from '../mongo_migrator.js'
+import { MongoMigration } from '#database/mongo_migrator'
 
 export default class CreateCommandsCollection extends MongoMigration {
   async up(): Promise<void> {

database/mongo_migrations/003_create_discovery_configs_collection.ts

@@ -1,4 +1,4 @@
-import { MongoMigration } from '../mongo_migrator.js'
+import { MongoMigration } from '#database/mongo_migrator'
 
 export default class CreateDiscoveryConfigsCollection extends MongoMigration {
   async up(): Promise<void> {

database/mongo_migrations/004_create_provisioning_configs_collection.ts

@@ -1,4 +1,4 @@
-import { MongoMigration } from '../mongo_migrator.js'
+import { MongoMigration } from '#database/mongo_migrator'
 
 export default class CreateProvisioningConfigsCollection extends MongoMigration {
   async up(): Promise<void> {

database/mongo_migrations/005_create_configurations_collection.ts

@@ -1,4 +1,4 @@
-import { MongoMigration } from '../mongo_migrator.js'
+import { MongoMigration } from '#database/mongo_migrator'
 
 export default class CreateConfigurationsCollection extends MongoMigration {
   async up(): Promise<void> {

database/mongo_migrations/006_create_configuration_versions_collection.ts

@@ -1,4 +1,4 @@
-import { MongoMigration } from '../mongo_migrator.js'
+import { MongoMigration } from '#database/mongo_migrator'
 
 export default class CreateConfigurationVersionsCollection extends MongoMigration {
   async up(): Promise<void> {

database/mongo_migrations/007_create_firmware_entries_collection.ts

@@ -1,4 +1,4 @@
-import { MongoMigration } from '../mongo_migrator.js'
+import { MongoMigration } from '#database/mongo_migrator'
 
 export default class CreateFirmwareEntriesCollection extends MongoMigration {
   async up(): Promise<void> {

database/mongo_migrations/008_create_migration_routes_collection.ts

@@ -1,4 +1,4 @@
-import { MongoMigration } from '../mongo_migrator.js'
+import { MongoMigration } from '#database/mongo_migrator'
 
 export default class CreateMigrationRoutesCollection extends MongoMigration {
   async up(): Promise<void> {

database/mongo_migrations/009_add_compliance_to_devices.ts

@@ -1,4 +1,4 @@
-import { MongoMigration } from '../mongo_migrator.js'
+import { MongoMigration } from '#database/mongo_migrator'
 
 export default class AddComplianceToDevices extends MongoMigration {
   async up(): Promise<void> {

database/mongo_migrations/010_drop_legacy_collections.ts

@@ -1,4 +1,4 @@
-import { MongoMigration } from '../mongo_migrator.js'
+import { MongoMigration } from '#database/mongo_migrator'
 
 export default class DropLegacyCollections extends MongoMigration {
   async up(): Promise<void> {

database/mongo_migrations/011_create_cwmp_exchanges_collection.ts

@@ -1,4 +1,4 @@
-import { MongoMigration } from '../mongo_migrator.js'
+import { MongoMigration } from '#database/mongo_migrator'
 
 export default class CreateCwmpExchangesCollection extends MongoMigration {
   async up(): Promise<void> {