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## Description Implements real-time company auto-association for contacts based on email domains. This is **Part 2** of the company model production rollout (CW-5726). **Task:** - When a contact is created with a business email, automatically create and associate a company from the email domain - When a contact is updated with an email for the first time (email was previously nil), associate with a company - Preserve existing company associations when email changes to avoid user confusion - Skip free email providers and disposable domains **Dependencies:** ⚠️ Requires PR #12657 (Part 1: Backfill migration) to be merged first **Linear ticket:** [CW-5726](https://linear.app/chatwoot/issue/CW-5726/company-model-setting-it-up-on-production) ## Type of change - [x] New feature (non-breaking change which adds functionality) ## How Has This Been Tested? - Service specs: Tests business email detection, company creation, association logic, edge cases (existing companies, free emails, nil emails) - Integration specs: Tests full callback flow for contact create/update scenarios - All tests passing: 10 examples, 0 failures - RuboCop: 0 offenses ## Checklist: - [x] My code follows the style guidelines of this project - [x] I have performed a self-review of my code - [x] I have commented on my code, particularly in hard-to-understand areas - [x] My changes generate no new warnings - [x] I have added tests that prove my fix is effective or that my feature works - [x] New and existing unit tests pass locally with my changes - [ ] Any dependent changes have been merged and published in downstream modules (PR #12657 pending) --------- Co-authored-by: Sojan Jose <sojan@pepalo.com>