repo_create: POST /user/repos or /orgs/{org}/repos, is_org flag routes
repo_update: PATCH /repos/{owner}/{repo}, confirm required when private=false
repo_mirror_push: add/list/delete push mirrors, password never returned
Shared LRU avoids repeated Gitea calls for default-branch resolution;
the simple stdlib map alternative would race on concurrent access without
a mutex per entry, which is more code than the LRU.
