Remote includes (include: remote: https://...) were previously skipped
silently in the resolver and rendered as unexpanded leaf nodes in the
graph.
Changes:
- fetcher.FetchURL: new shared unauthenticated HTTP GET helper
- resolver: resolveRemoteInclude fetches the URL, parses YAML, sets job
origin to the URL string, recursively resolves sub-includes, and emits
a warning on failure (lint continues on the rest of the pipeline)
- graph: recurseRemote fetches the URL, captures direct job names, and
recurses into sub-includes so remote nodes expand like local ones
Adds testdata/includes_remote.yml fixture.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
