The index is already added in production.
Adds a new reporting API that returns conversation counts grouped by
channel type and first response time buckets (0-1h, 1-4h, 4-8h, 8-24h,
24h+).
- GET /api/v2/accounts/:id/reports/first_response_time_distribution
- Uses SQL aggregation to handle large datasets efficiently
- Adds composite index on reporting_events for query performance
Tested on production workload.
Request: GET
`/api/v2/accounts/1/reports/first_response_time_distribution?since=<since>&until=<until>`
Response payload:
```
{
"Channel::WebWidget": {
"0-1h": 120,
"1-4h": 85,
"4-8h": 32,
"8-24h": 12,
"24h+": 3
},
"Channel::Email": {
"0-1h": 12,
"1-4h": 28,
"4-8h": 45,
"8-24h": 35,
"24h+": 10
},
"Channel::FacebookPage": {
"0-1h": 50,
"1-4h": 30,
"4-8h": 15,
"8-24h": 8,
"24h+": 2
}
}
```
---------
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>