fix: Register Tensor as Lua UserType on Lua instantiation (#190)

Author: besaleli

encoderfile-core/src/transforms/engine/mod.rs

@@ -88,6 +88,15 @@ fn new_lua() -> Result<Lua, ApiError> {
         ApiError::InternalError("Failed to create new Lua engine")
     })?;
 
+    lua.register_userdata_type::<Tensor>(|_| {})
+    .map_err(|e| {
+        tracing::error!(
+            "Failed to register Tensor as a UserType. This should not happen. More details: {:?}",
+            e
+        );
+        ApiError::InternalError("Failed to create new Lua engine")
+    })?;
+
     let globals = lua.globals();
     globals
         .set(