chore: add graphify knowledge graph outputs

Add generated knowledge graph (538 nodes, 664 edges) for codebase
navigation. Outputs are committed for portability across devices;
cache and cost tracking are gitignored.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.graphifyignore

@@ -0,0 +1,13 @@
+# Build & generated
+graphify-out/
+.tanstack/
+
+# Test artifacts
+test-results/
+playwright-report/
+e2e/test.db
+e2e/pgdata/
+
+# Uploaded user content
+uploads/
+