What does this PR do?

This PR adds support for using routing form responses as workflow variables for the new routing form triggers. Also booking questions can now be used in the Cal.ai template

Example:
Routing form field:

Workflow variable: {COMPANY_NAME}

• Fixes Routing form workflow variables #23749
• Fixes CAL-6401

Summary by cubic

Enables using routing form responses as workflow variables and allows Cal AI phone calls as actions in form-triggered workflows, including proper event type selection for outbound calls.

• New Features

  • Use routing form responses as variables in email, SMS, and AI phone call templates (supports arrays and custom fields).
  • Allow CAL_AI_PHONE_CALL in form-triggered workflows; calls can be scheduled from form submissions.
  • Pass routedEventTypeId from routing decisions to workflow scheduling; execute calls with form context.
  • Add outboundEventTypeId to agents for form-triggered calls; selectable in the Outgoing Calls tab when trigger is FORM_SUBMITTED.
  • Improve test/web call dialogs to validate and choose the right event type based on trigger.
  • Extend API v2 FORM_ALLOWED_STEP_ACTIONS to include CAL_AI_PHONE_CALL.

• Migration

  • Run Prisma migrate to add Agent.outboundEventTypeId.
  • When using FORM_SUBMITTED with Cal AI calls, select an outbound event type in Agent configuration.

^{Written for commit 81abd80. Summary will update automatically on new commits.}