The github pull-request fetcher needs to know whether a given remote is a
github-type service, which host its API lives on, and which owner/repo to
query against. Today the fetcher hardcodes the first two ("does the URL
contain github.com" and "https://api.github.com/graphql") and re-derives
owner/repo from the remote, which precludes GitHub Enterprise and makes
the fetch entry point take more arguments than it needs.
Add an accessor on the hosting service manager that exposes the already-
resolved service domain together with the parsed owner/repo, so callers
can answer all of these questions without reaching into the manager's
internals.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Add GitHubCommands struct with GraphQL-based PR fetching, and
GithubPullRequest model. Wire HostingService and GitHub command
structs into GitCommand.
Co-authored-by: Stefan Haller <stefan@haller-berlin.de>
