Once a value has been inferred from an object type in schema, is there any way to reset it? I have a field that was inferred as text, but I want to change it to an int.

For large datasets, it’s best to create a new collection with the updated definition for that field and reimport the documents. For small (say 500K or less), you can change the inferred definitions this way: https://typesense.org/docs/0.24.1/api/collections.html#modifying-an-existing-field