tree b30711fb6e2f4fb98dbbcc23eddc84f7ccd74d37
parent 048a68f3b2a3cbbacc215a888ef9dde5f2f63360
author Antonio Barone <syntonyze@gmail.com> 1758206600 +0200
committer Antonio Barone <syntonyze@gmail.com> 1758546953 +0200

Honor repo size quota enforcer during project import

Imports from GitHub did not consult repository-size quota enforcers,
allowing projects that exceeded configured limits to proceed, leading to
quota violations.

Introduce a preflight quota check to enforce limits early:
* Add `QuotaCheckStep`, which fetches the GitHub repository size and
  performs a `QuotaBackend` dry-run against `REPOSITORY_SIZE_GROUP`,
failing on error.
* Wire the step via Guice and `GitImporter`, placing it before clone,
  project creation so we fail fast with a clear error.
* Add `QuotaEnforcedException` for consistent, user-friendly error
  reporting when quota blocks an import.

When quotas allow, the import flow is unchanged. This ensures project
imports respect site policies rather than exceeding quota size limits.

Bug: Issue 445826646
Change-Id: I2ad8d35fac57581fc5e8fbc25134e0fdb90f52ab