Introduce opendataloader and PaddleOCR-VL parser engines with tenant-level
settings UI, replace liteparse, and harden Excel/PPT/Markdown parsing.
Optional odl-hybrid sidecar stays local-build only and is excluded from
default dev-start and full profiles.
The Go production splitter now uses DefaultChunkOverlap = 80
(~15% of DefaultChunkSize). Bringing the Python sidecar splitter to
the same number prevents subtle behavior drift if the docreader path
ever falls back to it for chunking.
https://claude.ai/code/session_01XADhx6mtu2ZYW3DE9Lun6k
- Add docstrings and inline comments for key functions and complex logic
- Unify comment style, eliminate magic numbers and ambiguous variable names
- No functional changes, only improve maintainability
wizardchen