chore(graphify): incremental graph rebuild from post-commit hook

Hook ran AST update after initial commit, refreshing graph.json,
GRAPH_REPORT.md, labels, and manifest. Adds dated snapshot at
graphify-out/2026-06-23/.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

graphify-out/2026-06-23/cost.json

@@ -0,0 +1,12 @@
+{
+  "runs": [
+    {
+      "date": "2026-06-24T01:11:55.678656+00:00",
+      "input_tokens": 0,
+      "output_tokens": 0,
+      "files": 451
+    }
+  ],
+  "total_input_tokens": 0,
+  "total_output_tokens": 0
+}