Data Types for utc_datetime, uuid, and Null Fields

Luke asked about null field filtering, to which Kishore Nallan provided a link explaining its unavailability.

sonu was encountering a 400 error due to null fields during Typesense indexing. Jason suggested upgrading to a recent version, removing null fields, and marking potentially null fields as `optional: true`. gab shared a similar issue and workaround.

michtio was querying using typesense-js and receiving fewer results than expected. Kishore Nallan suggested using different query parameters. Further discussion led to the handling of 'null' values and filtering syntax in the search queries. The thread ended with Jason offering migration support from Algolia to Typesense.

Mateo was struggling with a filtering error when dealing with empty/null strings in Algolia. Upon Jason's suggestion, they changed empty values to "Unknown" and exported the documents to resolve the issue.

gab asked about handling `string | null` fields in schemas. Kishore Nallan suggested they could be marked as optional, so either the field doesn't exist or the value can be null.