filter out in progress closest convos for sync

[mdmohsin7]

No description provided.

[gemini-code-assist]

Code Review

This pull request adds a filter to find only 'completed' conversations when searching for the closest conversation to a given timestamp. While the added filter is correct, the surrounding Firestore query is invalid and will cause a runtime error. The query attempts to use range filters on two different fields and orders by a third field, which violates Firestore's query constraints. I've left a critical comment with details on how to resolve this.

[gemini-code-assist]

While filtering by status is correct, the overall query is invalid and will cause a runtime error due to Firestore limitations. Specifically:

1. The query uses range filters on two different fields (finished_at on line 962 and started_at on line 963), which is not allowed. A Firestore query can only have range filters on a single field.
2. The query uses range filters, but the first order_by clause is on a different field (created_at on line 964). If a range filter is present, the first order_by must be on the same field as the range filter.

This query needs to be refactored. A possible solution is to use only one range filter in the query (e.g., on started_at) and then filter the remaining conditions (e.g., finished_at) in memory on the client side.