feat: land superpaper v1 notes scaffold

Add the ledger schema, class router, lint codes, ingest/build
pipeline, and three work-tree examples: align derivation,
superfig delegation, and supertensor delegation.

examples/tensor-delegate/notes/figures/F2/F2.tex

@@ -0,0 +1,31 @@
+\documentclass[border=10pt]{standalone}
+\usepackage[cjk]{supertensor}
+
+\stsetrole{q}{stTeal}
+\stsetrole{k}{stOrange}
+\stsetrole{s}{stCoral}
+
+\stdim{T}{6}
+\stdim{dh}{3}
+
+\begin{document}
+\begin{tikzpicture}
+\ststage{SA}{每头打分：沿 $d_h$ 收缩}
+\strow{rowA}{T}
+  \ststack[role=q, bracket=true]{Q}{}{T}{dh}{3}
+  \stglyph{mA}{$\times$}
+  \ststack[role=k, bracket=true]{KT}{}{dh}{T}{3}
+  \stglyph{eA}{$=$}
+  \ststack[role=s]{S}{}{T}{T}{3}
+\strowend
+\stcaption{Q}{$\mathbf Q^{(i)}$}{$h\times T\times d_h$}
+\stcaption{KT}{$\mathbf K^{(i)\top}$}{$h\times d_h\times T$}
+\stcaption{S}{$\mathbf S^{(i)}$}{$h\times T\times T$}
+\sttopformula{F}{$S^{(i)}=Q^{(i)}K^{(i)\top}$}
+\stbbox{all}
+\stmeaningbox{mb}{120mm}{all}
+  {$T$ 时间；$d_h$ 头维；$h$ 头数画成 stack 深度}
+  {$Q/K$ 是 value；$S$ 是 score，不是 mask}
+  {沿 $d_h$ 收缩；$K^\top$ 换面，收缩边等长}
+\end{tikzpicture}
+\end{document}