Handle mocks by calling to_dict on type

[alexmojaki]

Prevents this:

import unittest.mock
import logfire
logfire.configure()
logfire.info('hi', mock=unittest.mock.Mock())

from producing this:

and avoiding similar problems on other objects with __getattr__.

[cloudflare-workers-and-pages]

Deploying logfire-docs with    Cloudflare Pages

Latest commit:	23b1d29
Status:	✅  Deploy successful!
Preview URL:	https://cee62835.logfire-docs.pages.dev
Branch Preview URL:	https://alex-mock-to-dict.logfire-docs.pages.dev

View logs