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PROJ-142 Authentication flow redesign

As a user, I want to log in via SSO so that I don't need a separate password for every internal tool.

Acceptance criteria:

  • Browser redirects to the corporate SSO provider
  • After successful authentication, user lands on the dashboard
  • Session token is stored securely (httpOnly cookie)
  • Failed SSO attempts show a meaningful error message

Proposed flow:

Notes: The SSO provider returns a JWT token. Auth Service validates the signature against the provider's public key before creating a session. Token expiry is set to 8 hours to match the corporate policy. See the class diagram in PROJ-138 for the session model.

Updated by @anna.kowalski · 2 hours ago

This diagram is inside the description, not a panel
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