Upload QSOs and query logbook confirmations from a self-hosted Wavelog instance via its REST API

Steps

1. In your Wavelog instance, generate a read-only or read/write API key from the account API settings page.
2. POST ADIF QSO data as JSON to https://YOUR_WAVELOG_HOST/index.php/api/qso with a body containing your API key, station_profile_id, type: adif, and the ADIF record string; note this does not trigger a live QRZ push or callbook lookup even if those are otherwise enabled for the account.
3. Use https://YOUR_WAVELOG_HOST/api/get_contacts_adif with a fetchfromid delta cursor to incrementally stream new QSOs as ADIF-in-JSON, rather than re-pulling the whole log each time.
4. Use https://YOUR_WAVELOG_HOST/api/private_lookup to check whether a specific callsign/band/mode combination has already been worked and/or confirmed (LoTW, eQSL, QSL, Clublog) in the account's own logbook.
5. Set Content-Type: application/json and Accept: application/json headers on every POST, and respect any instance-owner-configured rate limit rather than polling endpoints like /api/radio on every second.