feat(pyoaev): transport source-declared injector_author on registration (#311)

[SamuelHassine]

Related issue

Closes #311

Summary

• Add injector_author to the injector registration payload (InjectorManager attribute allow-list).
• OpenAEVInjectorHelper reads injector_author from the connector configuration (source-declared, default None) and sends it at registration.

The platform (OpenAEV-Platform/openaev#6784) attributes every contract of the injector to an organization of this name; when absent it derives the author from the injector name, so this change is fully backward compatible.

[Copilot]

Pull request overview

This PR adds support for transporting an optional, source-declared injector_author field when registering an injector, enabling the OpenAEV platform to attribute injector contracts to the specified organization.

Changes:

• Add injector_author to the injector registration payload constructed by OpenAEVInjectorHelper.
• Add injector_author to the InjectorManager create attributes definition.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
pyoaev/helpers.py	Includes injector_author in the injector registration payload built by OpenAEVInjectorHelper.
pyoaev/apis/injector.py	Documents/permits injector_author as an optional field when creating injectors via the API manager.

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[SamuelHassine]

Review-and-fix pass complete - no code changes were needed:

• Independent review done against the platform consumers: InjectorCreateInput binds injector_author and InjectorService.resolveInjectorAuthor falls back to the injector name when the value is null or blank, so the transport is correct and fully backward compatible. The helper is the single injector registration path in pyoaev, so no other wiring is needed.
• Addressed the Copilot comment about sending JSON null instead of omitting the key: absent and null are indistinguishable server-side (Jackson binds both to Java null on a String field), the name fallback triggers identically in both cases including on PingAlive re-registrations, and explicit null matches the existing payload pattern for the other unset optional fields. Replied with the justification and resolved the thread.
• Verified locally on the branch: 164 tests pass, black and isort clean on the touched files. All CI checks are green, the commit is signed, the PR is linked to feat(injector): transport a source-declared injector author on registration #311 and the title matches the repository convention.

Note: I cannot approve this PR since I am its author - it needs an approving review from another maintainer to unblock merge.