Synthesize __buffer__ for C types supporting buffer protocol (Python 3.12+)

When running on Python 3.12+, probe classes with memoryview() and add
__buffer__(flags: int, /) -> memoryview if the buffer protocol is supported.
This enables type-safe memoryview() calls on mathutils types in Blender 5.1+.

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

introspect.py

@@ -1498,6 +1498,31 @@ def introspect_class(cls: type[object], module_name: str) -> StructData:
             }
         )
 
+    # Synthesize __buffer__ for classes supporting the C buffer protocol.
+    # Only available in Python 3.12+ (PEP 688).
+    if sys.version_info >= (3, 12) and "__buffer__" not in method_names:
+        try:
+            instance = cls()
+            memoryview(instance)
+            methods.append(
+                {
+                    "name": "__buffer__",
+                    "doc": "",
+                    "params": [
+                        {
+                            "name": "flags",
+                            "type": "int",
+                            "default": None,
+                            "kind": "POSITIONAL_ONLY",
+                        }
+                    ],
+                    "return_type": "memoryview",
+                    "is_classmethod": False,
+                }
+            )
+        except Exception:
+            pass
+
     return {
         "name": cls.__name__,
         "doc": class_doc,