## Summary
Move/mirror blockchain specs from Notion into GitHub/mdBook
## Changes
- Imported missing blockchain raw/deprecated specs, appendices, images,
PDFs, notebooks, and local assets.
- Replaced remaining Notion-hosted resources/links with local GitHub
files where applicable.
- Renamed/updated Nomos references to Logos Blockchain terminology.
- Deprecated DA-related specs and other specs that are deprecated in
Notion.
- Fixed Markdown/mdBook/GitHub rendering issues for math, tables, code
blocks, captions, Mermaid/SVG diagrams, local links, and navigation.
- Added/updated rendering validation so future broken math, raw Notion
links, and migration artifacts are caught by lint.
- Cleaned markdownlint/remark issues across affected specs.
## Validation
- `make lint`
- `mdbook build`
