[TT-14041] feat: do not track API key

coprocess/proto/coprocess_session_state.proto

@@ -180,4 +180,8 @@ message SessionState {
   // MaxQueryDepth relates to graphQL APIs. If the session key has a maximum query depth limit defined then it is included in the
   // session instance. Currently unsupported and under development.
   int64 max_query_depth = 31;
+
+  // DoNotTrack is set to true to prevent the session from being tracked in the analytics.
+  // This is useful if there is a key which analytics are not required (e.g. health checks)
+  bool do_not_track = 32;
 }

gateway/handler_error.go

@@ -198,6 +198,12 @@ func (e *ErrorHandler) HandleError(w http.ResponseWriter, r *http.Request, errMs
 
 		oauthClientID := ""
 		session := ctxGetSession(r)
+
+		// If the key is configured to not track, then we don't track
+		if session.DoNotTrack {
+			return
+		}
+
 		tags := make([]string, 0, estimateTagsCapacity(session, e.Spec))
 
 		if session != nil {

gateway/handler_success.go

@@ -187,6 +187,12 @@ func (s *SuccessHandler) RecordHit(r *http.Request, timing analytics.Latency, co
 		oauthClientID := ""
 		var alias string
 		session := ctxGetSession(r)
+
+		// If the key is configured to not track, then we don't track
+		if session.DoNotTrack {
+			return
+		}
+
 		tags := make([]string, 0, estimateTagsCapacity(session, s.Spec))
 		if session != nil {
 			oauthClientID = session.OauthClientID

user/session.go

@@ -285,6 +285,7 @@ type SessionState struct {
 	LastUpdated             string                 `json:"last_updated" msg:"last_updated"`
 	IdExtractorDeadline     int64                  `json:"id_extractor_deadline" msg:"id_extractor_deadline"`
 	SessionLifetime         int64                  `bson:"session_lifetime" json:"session_lifetime"`
+	DoNotTrack 							bool 									 `json:"do_not_track" msg:"do_not_track"`
 
 	// Used to store token hash
 	keyHash string