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/pipeline-delegate/notes/figures/F1/F1-mechanism.md

@@ -0,0 +1 @@
+一次前向 $x\to f_\theta\to\hat y$。损失挂在预测下方，不是主路车站。