The SDK supplies Microsoft.SourceLink.Common and the git tasks, so the build
resolved the repository URL and commit but had no host provider to turn them
into fetchable URLs. Every project warned that the generated source link was
empty - 477 times in the last validate run - and shipped PDBs that could not
locate their sources.
Referencing the GitHub provider, as AudibleApi already does, fills the map in:
{"documents":{"/repo/*":"https://raw.githubusercontent.com/rmcrackan/libation/<sha>/*"}}
Co-authored-by: rmcrackan <rmcrackan@gmail.com>
