feat: import Chinese-localized Buzz source snapshot

Signed-off-by: cls_宁波本机 <908705107@qq.com>

docs/formal/nip-pl/fixed_payload_mutation.py

@@ -0,0 +1,16 @@
+"""Mutation teeth: each tempting caller->body flow must violate the theorem."""
+from itertools import product
+from fixed_payload import C, DOMAINS
+
+caught = 0
+for index in range(len(DOMAINS)):
+    violations = 0
+    for inputs in product(*DOMAINS):
+        mutated = C + b":" + inputs[index]  # mutant copies one input category
+        if mutated != C:
+            violations += 1
+    assert violations
+    caught += 1
+    print(f"input category {index}: {violations} violations caught")
+assert caught == len(DOMAINS)
+print("RESULT: ALL NONINTERFERENCE MUTANTS CAUGHT")