fix(server): repository lookups go through a host's rate-limit pause

Looking up a repository to add or clone it is a user action, so it runs
with SourceControlRateLimit.Interactive. The GitManager and repository
service tests now show the user action succeeding while background reads
to the same host stay paused.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
bbb8bdd3a7PR Batch Tester committed on 10/23/2026, 10:38:11 AMparent39a85c4
3 files changedLine totals unavailable