Revert "Ignore constants.ts from coverage"

This reverts commit 5d542ea.

vitest.config.mts

@@ -16,7 +16,6 @@ function generateConfig(): Promise<UserConfigExport> {
             '**/cypress/**',
             '**/.{idea,git,cache,output,temp}/**',
             '**/{karma,rollup,webpack,vite,vitest,jest,ava,babel,nyc,cypress,tsup,build}.config.*',
-            'arches_lingo/constants.ts',
         ];
 
         const rawData = fs.readFileSync(path.join(__dirname, '.frontend-configuration-settings.json'), 'utf-8');