Sources diagnostics
S001 - 'git' source is underspecified
A git source uses a specification that doesn't meet the minimum specifier required by sources.required-git-spec.
S002 - source explicitly allowed
A crate source is explicitly allowed by sources.allow-git or sources.allow-registry.
S003 - source allowed by organization allowance
A crate source was explicitly allowed by an entry in sources.allow-org.
S004 - detected source not explicitly allowed
A crate source was not explicitly allowed.
S005 - allowed source was not encountered
An allowed source in sources.allow-git or sources.allow-registry was not encountered.
S006 - allowed organization was not encountered
An allowed source in sources.allow-org was not encountered.