chore: checkpoint before Python removal

vendor/wasm-bindgen-shared/src/schema_hash_approval.rs

@@ -0,0 +1,16 @@
+// Whenever the lib.rs changes, the SCHEMA_FILE_HASH environment variable will change and the
+// schema_version test below will fail.
+// Proceed as follows:
+//
+// If the schema in this library has changed then:
+//  1. Change this APPROVED_SCHEMA_FILE_HASH to the new hash.
+//
+// If the schema in this library has changed then:
+//  1. Bump the version in `crates/shared/Cargo.toml`
+//  2. Change the `SCHEMA_VERSION` in this library to this new Cargo.toml version
+const APPROVED_SCHEMA_FILE_HASH: &str = "4279711543728568852";
+
+#[test]
+fn schema_version() {
+    assert_eq!(env!("SCHEMA_FILE_HASH"), APPROVED_SCHEMA_FILE_HASH)
+}