Introduce isCustomDomainEnabled field in Workspace entity to manage
custom domain activation. Update related services, types, and logic to
validate and toggle the custom domain's status dynamically based on its
current state. This ensures accurate domain configurations are reflected
across the system.
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Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>
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