feat: establish reproducible FreeCAD web compatibility baseline

config/qa04-fcstd-fuzz-verification.json

@@ -0,0 +1,30 @@
+{
+  "status": "fcstd-parser-fuzz-pass",
+  "seed": "0x5f3759df",
+  "cases": 1000,
+  "counts": {
+    "accepted": 231,
+    "rejected": 769,
+    "validCases": 231,
+    "invalidCases": 769
+  },
+  "categories": {
+    "depth-limit": 77,
+    "duplicate-object-id": 77,
+    "empty-document": 77,
+    "empty-object-id": 77,
+    "entity-declaration": 77,
+    "invalid-gui-root": 77,
+    "invalid-utf8": 77,
+    "malformed-close": 77,
+    "node-limit": 77,
+    "opaque-resource": 77,
+    "proxy-object": 77,
+    "traversal-path": 76,
+    "wrong-document-root": 77
+  },
+  "timing": {
+    "p95Ms": 0.121,
+    "maxMs": 2.672
+  }
+}