Is your feature request related to a problem? Please describe.
Current ingestion pipeline (ilab rag ingest ...) calculate document chunks to be embedded and indexed in the target document store: the stored documents do not include any metadata.

Describe the solution you'd like
Replicate the behavior of the docling-haystack package to include the metadata defining the chunk hierarchy and the basic information calculated by the Docling HybridChunker:
converter.py