fix(auth): optimise user sessions (#7199)

* fix(auth): start optimise user sessions

* reduce and query user sessions directly without gorm statements

* cleanup

* cleanup

* fix requested changes

---------

Co-authored-by: Livio Spring <livio.a@gmail.com>

internal/user/repository/view/user_session_by_id.sql

@@ -0,0 +1,29 @@
+SELECT s.creation_date,
+       s.change_date,
+       s.resource_owner,
+       s.state,
+       s.user_agent_id,
+       s.user_id,
+       u.username,
+       l.login_name,
+       h.display_name,
+       h.avatar_key,
+       s.selected_idp_config_id,
+       s.password_verification,
+       s.passwordless_verification,
+       s.external_login_verification,
+       s.second_factor_verification,
+       s.second_factor_verification_type,
+       s.multi_factor_verification,
+       s.multi_factor_verification_type,
+       s.sequence,
+       s.instance_id
+FROM auth.user_sessions s
+         LEFT JOIN projections.users10 u ON s.user_id = u.id AND s.instance_id = u.instance_id
+         LEFT JOIN projections.users10_humans h ON s.user_id = h.user_id AND s.instance_id = h.instance_id
+         LEFT JOIN projections.login_names3 l ON s.user_id = l.user_id AND s.instance_id = l.instance_id AND l.is_primary = true
+WHERE (s.user_agent_id = $1)
+  AND (s.user_id = $2)
+  AND (s.instance_id = $3)
+LIMIT 1
+;