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.

tests/router_test.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python3
+import sys
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1] / "scripts"))
+from router import accepted, check_row, suggest
+
+
+def expect(cond, msg):
+    if not cond:
+        raise SystemExit(f"FAIL: {msg}")
+
+
+expect(suggest({"loss-curve"}) == "numeric", "loss-curve class")
+expect(accepted("numeric") == frozenset({"screenshot", "matplotlib"}), "numeric accepted")
+expect(suggest({"table"}) == "raster", "table class")
+expect("matplotlib" not in accepted("raster"), "raster rejects matplotlib")
+expect(suggest({"axis", "architecture"}) == "SPLIT:tensor+fig", "split order")
+expect(
+    check_row({"axis", "architecture"}, "superfig") == "SP011",
+    "mixed row",
+)
+expect(check_row({"rewrite-figure"}, "align", phase=1) is None, "align ok")
+expect(check_row({"rewrite-figure"}, "superderive", phase=1) == "SP010", "derive v1")
+expect(suggest(set()) == "none", "empty")
+expect(suggest({"notation"}) == "none", "notation")
+expect(check_row(set(), "none", status="included") == "SP013", "none included")
+expect(
+    check_row({"rewrite-figure"}, "align", include="figures/F1/build/F1.pdf") == "SP014",
+    "align include",
+)
+expect(
+    check_row({"architecture"}, "superfig", status="included", include=None) == "SP015",
+    "vector null include",
+)
+expect(
+    check_row({"table"}, "screenshot", status="included", include="nope.png", fig_id="F2")
+    == "SP016",
+    "screenshot path",
+)
+print("router_test ok")