Automatic release v5.1.61 (from `v2-mst-aptd-gcms-lcz-sty`)

Fix Sentry config on the server side (#377)

* Re-export Sentry from init (DX) and call init from error endpoint to see if it fixes the issue with flush() timeout

* Improve sentry init documentation + rollback to timeout 2s + auto-init Sentry when using configureReq

* Implement better error handling on _error page (enrich Sentry metadata from req object)

* Fix 404 error handling and reporting to Sentry

* Improve documentation about error handling

* Upgrade Sentry to latest (minor)