chore(graphify): knowledge graph of the repo (1398 nodes, 1627 edges)

Generated via /graphify over the full tree (177 files, ~320k words).
Produces graph.html, graph.json, GRAPH_REPORT.md plus per-file
extraction cache so incremental --update runs reuse prior results.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

graphify-out/cost.json

@@ -0,0 +1,18 @@
+{
+  "runs": [
+    {
+      "date": "2026-04-18T20:33:20.207376+00:00",
+      "input_tokens": 0,
+      "output_tokens": 0,
+      "files": 173
+    },
+    {
+      "date": "2026-04-21T13:36:46.709199+00:00",
+      "input_tokens": 0,
+      "output_tokens": 0,
+      "files": 177
+    }
+  ],
+  "total_input_tokens": 0,
+  "total_output_tokens": 0
+}