Configurable CSAT frequency

Problem
Featurebase currently offers two CSAT settings: send after every conversation, or turn CSAT off entirely. No option sits between these two extremes.

Customers with high contact volume get a CSAT request after each chat or email, even when they reach out multiple times in one day. Several of our customers flagged this as too many messages from Featurebase.

Request
Add a setting for minimum time between CSAT requests per customer, similar to what HubSpot offers.

Example: set the interval to 30 days. A customer who contacts us 50 times within those 30 days gets one CSAT request, not 50. Once 30 days pass since their last CSAT, their next interaction triggers a new request.

Benefit
This caps CSAT volume at a predictable maximum. A 30 day interval means 12 requests per year at most, instead of a volume that scales with contact frequency. CSAT data also improves, since results reflect sentiment over time rather than getting skewed by repeat contacts in a short window.

Suggested setup
A numeric field for minimum days between CSAT requests, set per workspace or per channel.