style(public): drop a needless escape in the lot number pattern

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

ApiCore-Backend/src/public/public.controller.ts

@@ -5,7 +5,7 @@ import { Public } from '../auth/decorators/public.decorator';
 import { PublicBatch, PublicService } from './public.service';
 
 // What a printed lot number can look like - anything else is not a lot.
-const LOT_NUMBER_PATTERN = /^[A-Za-z0-9._\/-]{1,64}$/;
+const LOT_NUMBER_PATTERN = /^[A-Za-z0-9._/-]{1,64}$/;
 
 @ApiTags('public')
 @Public()