Certificate — Adopt Domain Exceptions & Unified Error Handling

[Villarley]

Description

Refactor certificate module.

Scope

• Controllers presentation/controllers/*, services/use-cases.

Tests

• Ensure 404/400/409 and body fields conform.

Acceptance criteria

• Only domain exceptions used; tests green.

[JXPlayer]

Hi my name is Jonathan and I want to contribute to this open source project