fix: include options parameter in createIndex method

[digorgonzola]

Problem: When defining custom index names in model settings, the connector was ignoring the specified name option and falling back to MongoDB's default naming convention (e.g., "archived_1" instead of "archived").

Root Cause: The createIndex() call was missing the options parameter, so custom index options including the name field were not being passed to MongoDB.

Solution: Updated the createIndex() call to include the index.options parameter:

Checklist

• DCO (Developer Certificate of Origin) signed in all commits
• npm test passes on your machine (fails 1 test but this is unrelated)
• New tests added or existing tests modified to cover all changes
• Code conforms with the style guide
• Commit messages are following our guidelines