Create or update customer records
telemetronCustomerId: Creates new customer (409 error if email exists)telemetronCustomerId: Updates existing customer| Code | Description |
|---|---|
| 200 | Customer created or updated successfully |
| 400 | Invalid request (missing required fields, invalid JSON payload, or invalid format) |
| 401 | Invalid or missing API key |
| 404 | Customer not found (when updating with telemetronCustomerId) |
| 409 | Customer already exists with the provided email |
| 500 | Internal server error |