docs: rename the model to GrapHist++ in prose

Fix stale paths and resync the shipped modeling code

Correct the repository tree description

Update README.md

Link the code repository

Link the authors to their sites

Cite every source cohort, note LTS4 supervision and the separate code repository

Restore the full parameter counts, correct the control value, clarify what inference needs

Correct library versions, add authorship, remove em dashes

New model card: GrapHist v2 only, shorter, matches the new layout

Model card: v1_graphs_upstream now includes the 271 GB TCGA mirror

List preproc_final and homophily_bach_cellvit in the repository tree

Record that all four vicreg_full checkpoints are weight-identical

Fix BACH mkdir blocker, line citations, clinical row count, silently wording

List data/survival/ in the repository tree

Correct concat_hidden semantics, inference param count, citation authors

Model card: add checkpoints/ and data/ tree, point to the artifact map

Add GrapHist v2 + VICReg final checkpoint (best val loss, epoch 99) with loader files and validated model card