Pull Aircall call recordings and analytics via the API

Steps

1. Authenticate with HTTP Basic Auth using your Aircall API ID as the username and API token as the password against the base URL https://api.aircall.io/v1.
2. List calls within a time window with GET /v1/calls?from={unix_timestamp}&to={unix_timestamp}&per_page=50; paginate with the 'page' param until no further results are returned.
3. Each call object in the response contains a 'recording' field — when present, it is a URL to the call recording audio file; download recordings by issuing an authenticated GET request to that URL.
4. Extract analytics fields from each call record: 'duration', 'answered_at', 'ended_at', 'direction' (inbound/outbound), 'missed', 'user' (agent), and 'number' (Aircall line used).
5. Filter calls by a specific Aircall number ID using the 'number_id' query param, or by user with 'user_id', to produce per-line or per-agent reports.
6. Aggregate duration, missed-call rate, and average handling time in your data pipeline; join on 'user.id' to map call records to agent names from GET /v1/users.