[MM-56339] Audit logs: on login add UserId and SessionId to audit's Actor field (#27446)

* on login add UserId and SessionId to audit's Actor field to match logout

* lint

* simplify to add only userId and sessionId

* AddToEventActor -> AddUser/SessionToEventActor

* fill in missing session data when logging the audit record

* why did it bump that? reverting.

* make modules-tidy

* trigger build

* add more context to the comment

server/go.mod

@@ -84,7 +84,7 @@ require (
 )
 
 require (
-	github.com/HdrHistogram/hdrhistogram-go v0.9.0 // indirect
+	github.com/HdrHistogram/hdrhistogram-go v1.1.2 // indirect
 	github.com/JalfResi/justext v0.0.0-20221106200834-be571e3e3052 // indirect
 	github.com/PuerkitoBio/goquery v1.9.0 // indirect
 	github.com/RoaringBitmap/roaring v1.9.0 // indirect