docs: state the working layout and the pseudo-label taxonomy

docs: state the upstream licences and make the usage block runnable

docs: drop em dashes from the markdown

docs: finish the MIT relicense and state the input transforms

docs: fix the verification step and ship the homophily tail metrics

docs: correct the reproduction instructions

docs: correct the SPIDER probe path

docs: finish the GrapHist++ rename

Fix stale paths and resync the shipped modeling code

Bring the studies contents in line with what actually ships

Link the code repository; point script paths at its layout

Link the authors to their sites

Cite every source cohort, note LTS4 supervision

Make every command runnable from the repo root; fix the folder-limit and gate wording

Add authorship, remove em dashes

Rewrite DATA.md for a general audience: no branches, per-dataset reference, absorbs the study numbers

Move data docs to DATA.md and rewrite every path for the new structure

Restructure: move batch 1/30