misc(customer): Expose error_details on API

[vincent-pochet]

This PR is related to

• misc(wallet): Catch and log invalid address error lago-api#5201
• misc(customer): Document error_details on API lago-openapi#512

It exposes the error_details on the customer related end-points

[Copilot]

Pull request overview

This PR updates the Python client + test fixtures to surface error_details on customer-related API responses (aligned with the upstream lago-api / OpenAPI changes), and updates the error detail model to match the payload shape.

Changes:

• Add error_details to the CustomerResponse model.
• Update ErrorDetailResponse to use lago_id (instead of organization_id).
• Update JSON fixtures (customer.json, invoice.json) to include error_details and apply minor formatting changes.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
tests/fixtures/invoice.json	Adds an error_details array to the invoice fixture and minor JSON formatting tweaks.
tests/fixtures/customer.json	Adds an error_details array to the customer fixture and minor JSON formatting tweaks.
lago_python_client/models/error_detail.py	Renames organization_id → lago_id on ErrorDetailResponse.
lago_python_client/models/customer.py	Exposes error_details on CustomerResponse (typed as ErrorDetailsResponse).

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