bug: EAN encoder throws plain Error instead of InvalidInputError

[productdevbook]

Summary

The EAN encoder in src/encoders/ean.ts throws plain Error instead of InvalidInputError from the project's error classes, inconsistent with all other encoders.

Details

// ean.ts line 87
throw new Error("EAN-13 requires 12 or 13 digits");
// ean.ts line 150
throw new Error("EAN-8 requires 7 or 8 digits");

Every other encoder in the project uses:

import { InvalidInputError } from "../errors";
throw new InvalidInputError("...");

Impact

• Users catching InvalidInputError will miss EAN validation errors
• Inconsistent error handling behavior across the library

Fix

Import InvalidInputError and replace both throw new Error(...) calls.

[productdevbook]

Fixed in commit a0867b3 / e4631a5 / b4e8107