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  (unused, superseded by paginateVersions) and unused exception classes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/models/command.ts

@@ -1,6 +1,6 @@
 import { BaseModel } from '#database/base_model'
-import { CommandRecord, CommandStatus } from '../domain/commands/command.js'
-import { ModeType } from '../domain/shared/mode.js'
+import { type CommandRecord, CommandStatus } from '#domain/commands/command'
+import { type ModeType } from '#domain/shared/mode'
 import { ObjectId } from 'mongodb'
 
 export default class CommandModel extends BaseModel {
@@ -8,14 +8,19 @@ export default class CommandModel extends BaseModel {
 
   static async findByDevice(deviceIdentifier: string): Promise<CommandRecord[]> {
     const collection = this.getCollection()
-    return collection.find({ deviceIdentifier }).sort({ createdAt: -1 }).toArray() as unknown as Promise<CommandRecord[]>
+    return (await collection
+      .find({ deviceIdentifier })
+      .sort({ createdAt: -1 })
+      .toArray()) as unknown as Promise<CommandRecord[]>
   }
 
   static async findPending(deviceIdentifier: string, mode?: ModeType): Promise<CommandRecord[]> {
     const filter: any = { deviceIdentifier, status: CommandStatus.PENDING }
     if (mode) filter.mode = mode
     const collection = this.getCollection()
-    return collection.find(filter).sort({ priority: 1 }).toArray() as unknown as Promise<CommandRecord[]>
+    return collection.find(filter).sort({ priority: 1 }).toArray() as unknown as Promise<
+      CommandRecord[]
+    >
   }
 
   static async createCommand(command: Omit<CommandRecord, '_id'>): Promise<CommandRecord> {