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This pull request improves the scalability of the session API by enhancing middleware tracing and refining SQL query behavior for user authentication methods. # Which Problems Are Solved - Eventstore subscriptions locked each other during they wrote the events to the event channels of the subscribers in push. - `ListUserAuthMethodTypesRequired` query used `Bitmap heap scan` to join the tables needed. - The auth and oidc package triggered projections often when data were read. - The session API triggered the user projection each time a user was searched to write the user check command. # How the Problems Are Solved - the `sync.Mutex` was replaced with `sync.RWMutex` to allow parallel read of the map - The query was refactored to use index scans only - if the data should already be up-to-date `shouldTriggerBulk` is set to false - as the user should already exist for some time the trigger was removed. # Additional Changes - refactoring of `tracing#Span.End` calls # Additional Context - part of https://github.com/zitadel/zitadel/issues/9239 --------- Co-authored-by: Tim Möhlmann <tim+github@zitadel.com>