Auth: fixed session invalidation logic

[martastain]

This pull request includes changes to the session management and configuration in the ayon_server module. The most important changes involve updating the session lifetime logic and modifying the default session TTL configuration.

• Updated the logic to extend the session lifetime only if the remaining TTL is less than the TTL minus 120 seconds. This change ensures that the session is updated more efficiently.
• Changed the default session TTL from 24 hours to 72 hours to provide a longer session lifetime by default (hold session over the weekend)