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  (unused, superseded by paginateVersions) and unused exception classes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.

app/controllers/references_controller.ts

@@ -1,6 +1,6 @@
 import type { HttpContext } from '@adonisjs/core/http'
 import DeviceModel from '#models/device'
-import { getReferenceEngine } from '../services/references/reference_engine.js'
+import { getReferenceEngine } from '#services/references/reference_engine'
 
 export default class ReferencesController {
   /**
@@ -24,7 +24,9 @@ export default class ReferencesController {
     }
     const ref = (device.references || []).find((r: any) => r.provider === params.provider)
     if (!ref) {
-      return response.status(404).json({ message: `No reference from provider '${params.provider}'` })
+      return response
+        .status(404)
+        .json({ message: `No reference from provider '${params.provider}'` })
     }
     return response.json(ref)
   }
@@ -51,7 +53,10 @@ export default class ReferencesController {
         (r: any) => !results.some((nr) => nr.provider === r.provider)
       )
       const merged = [...existing, ...results]
-      await DeviceModel.updateOne({ identifier: params.identifier }, { $set: { references: merged, updatedAt: new Date() } })
+      await DeviceModel.updateOne(
+        { identifier: params.identifier },
+        { $set: { references: merged, updatedAt: new Date() } }
+      )
     }
 
     return response.json({ resolved: results.length, references: results })
@@ -72,7 +77,9 @@ export default class ReferencesController {
     const result = await engine.resolveOne(params.provider, device, context)
 
     if (!result) {
-      return response.status(404).json({ message: `Provider '${params.provider}' not found or cannot resolve` })
+      return response
+        .status(404)
+        .json({ message: `Provider '${params.provider}' not found or cannot resolve` })
     }
 
     // Merge into device references