xlsx working, room for improvments

added docx support

improved chunking: merged_item mode, chunk-debug path, subprocess worker

Improve docling chunking: hierarchical cleanup, table heuristics, config flags

fixed markdown has attribute bug

added some logging and disabled docx

added ping endpoint and namespace creation on /vectorize call

added .xlsx and .docx support

added fallback to 1 markdown chunk

improved logging

disabled picture classification

testing with more classification models

pushed some broke code fix tomorrow

init push