Single-file ingest entry. Copies bytes to _external/<hash12>.<ext>
via crate::external::copy_to_external, runs the per-medium pipeline on
that single asset (reuses ingest_with_config_opts via a SourceScope
{ root: _external/, include: [<filename>], exclude:
config.workspace.exclude }).
`.kebabignore` matches log a stderr warn line and proceed (explicit
ingest is bypass intent). Internal helper `check_kebabignore_match`
uses the `ignore` crate's GitignoreBuilder.
Returns the standard IngestReport (incremental ingest from fb-23
handles re-ingest as `unchanged`).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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