Test IVR call quality using the CALL-E API from a phone task list

Description

Quick overview
This workflow manually triggers two sequential IVR quality-sample calls via the CALL-E API, validating transcripts and metadata post-call. Note: Default placeholders must be replaced with authorized E.164 test numbers before execution.

How it works
Runs when you start the workflow manually.
Loads the CALL-E API configuration (base URL, polling interval, timeout) and stops with an error if the API key is missing.
Creates a small list of IVR QA call tasks (phone, task instructions, locale/region, and metadata) to be processed.
Processes the call list one item at a time, building the CALL-E /v1/calls request with a JSON result schema, metadata, and an idempotency key.
Calls the CALL-E API to create the call and repeatedly polls the call status until it reaches a terminal state (completed/failed/canceled) or times out.
Extracts the call outcome, structured result, transcript turns, and failure signals, then formats a demo-friendly per-call view and an overall execution summary.

Setup
Add your CALL-E API key by replacing replace_with_calle_api_key in the CALL-E configuration step.
Replace the sample phone numbers with numbers you own or are authorized to call, and adjust the task text and metadata for your IVR QA scenario.
Review and adjust the CALL-E base URL, polling interval, and timeout values if your environment requires different settings.