Investigate fetching resolution criteria and fine print for Metaculus markets from API

[coderabbitai]

The current implementation for MetaculusAgentMarket in the PR #308 does not include resolution criteria and fine print as part of the description because they are not available in the MetaculusQuestion model.

Please investigate if it's possible to fetch this additional information (resolution criteria and fine print) from some API endpoint.

For reference, see the discussion in this comment.