simplify logger time and avoid possible crashes (#13986)

time.Format() is not necessary prematurely for JSON
marshalling, since JSON marshalling indeed defaults
to RFC3339Nano.

This also ensures the 'time' is remembered until its
logged and it is the same time when the 'caller'
invoked 'log' functions.

internal/logger/message/audit/entry.go

@@ -31,10 +31,10 @@ const Version = "1"
 
 // Entry - audit entry logs.
 type Entry struct {
-	Version      string `json:"version"`
-	DeploymentID string `json:"deploymentid,omitempty"`
-	Time         string `json:"time"`
-	Trigger      string `json:"trigger"`
+	Version      string    `json:"version"`
+	DeploymentID string    `json:"deploymentid,omitempty"`
+	Time         time.Time `json:"time"`
+	Trigger      string    `json:"trigger"`
 	API          struct {
 		Name            string `json:"name,omitempty"`
 		Bucket          string `json:"bucket,omitempty"`
@@ -61,7 +61,7 @@ func NewEntry(deploymentID string) Entry {
 	return Entry{
 		Version:      Version,
 		DeploymentID: deploymentID,
-		Time:         time.Now().UTC().Format(time.RFC3339Nano),
+		Time:         time.Now().UTC(),
 	}
 }