Show “Last login” and “Created at” in the user table (Closes #174)

[DJeanS03]

• Adds two columns to the user table: Last login and Created at.
• Backend enriches context with last_login_at (aggregated from LoginLogging without N+1).
• Dates rendered in a readable format (DD/MM/YYYY HH:mm), with ISO in title and data-order for stable sorting.
• Versions persisted table state to users:list:v2:* (query/order/length/page) and disables DataTables’ stateSave to avoid conflicts.

Closes #174.

[italovalcy]

Jean, as we talked, please apply some adjustments on this PR to facilitate review:

1. Please undo all styling changes, unless they are necessary for the implementation you are doing
2. Please create a column on the users table for "last_login" and apply the respective changes on authentication blueprint to save this information
3. please leave only the minimal set of changes to make this PR archive its original goal