document_repository: replace $.ajax with lorisFetch

[Montekkundan]

Summary

Replace $.ajax calls with lorisFetch in document_repository.

Why

This removes jQuery AJAX usage in this module for issue #4213.

Scope

Only AJAX replacement in this module. No unrelated jQuery refactors.

Dependency

Depends on PR #10333.

Verification

git grep '\$\.ajax' is clean for touched files.

[Montekkundan]

Updated

• Added module client: modules/document_repository/jsx/DocumentRepositoryClient.js
• Updated modules/document_repository/js/document_repository_helper.js:
  • editModal() now uses module client for getFileData.php with Query-based request flow.

Notes

• This replaces direct lorisFetch(...).json() in the reviewed block with the module Client pattern from [jslib] Refactored Acknowledgements with Enhanced HTTP Utilities #9999.

[HenriRabalais]

Client implementation looks good!