Mark Collaborators as Inactive

🔍 Problem Statement

Currently, as an admin I cannot mark a collaborator as inactive and the only option to remove access is to delete the account entirely, which revokes any associated API keys and breaks integrations.

💡 User Stories

As an Account Owner or Admin, I want to mark a collaborator account as inactive (suspended) without deleting it, so that I can revoke access for employees on extended leave or disability while preserving their account data and any associated API keys.

🎯 Definition of Done (DoD)

Inactive Account State

1. ✔ Given an active collaborator account, when an Account Owner or Admin marks it as inactive, then the collaborator can no longer log in, but their account record and all associated API keys are preserved.

2. ✔ Given a reactivation action, when an Account Owner or Admin restores the collaborator, then login and API key access are fully restored.

3. ✔ This change will impact API + UI, specifically GET/PATCH /collaborators/{id} (new status field) and the Collaborators list/detail UI.

4. ✔ Limitations: inactive collaborators cannot be used for SSO; API keys belonging to inactive collaborators remain valid at the key level but the collaborator session is blocked.