## Summary
Adds construction-time parameter validation to the ingestion
`ParserComponent` (mirroring the applicable subset of Python
`ParserParam.check()`), fixes a family-mapping mismatch that silently
skipped `output_format` validation and setup configuration for
image/audio files, and aligns the no-CGO parser stubs with the CGO
variants by threading `context.Context` through `ParseWithResult`.
Ports remaining Go parser wiring and PDF backends, adds tenant-aware VLM
dispatch, aligns post-processing with Python, and adds end-to-end
pipeline coverage with a generated six-page PDF.
