Simplified Account Flow Migration

## Problem / Need: What this requirement solves
* We need to migrate companies with users who do not currently have accounts. This ticket will track the migration efforts

## Scope: What’s included, what’s explicitly excluded
* Migrating a set number of companies in migration cohorts.

## Acceptance Criteria: Measurable, testable outcomes
* Companies are migrated successfully with minimal impact on call desks

## Dependencies / Risks: Blockers, conflicts
*

## Proposed Solution: High-level description (leave implementation detail to dev)
* Migration pipeline focused on bringing over relevant cohorts.

References:
Figma: https://www.figma.com/board/BmkTMxWEj4WPEwLyVQIXxV/Corporations-Roadmap?node-id=0-1&t=e5qjz0me9Kua2uDU-0