feat: add health check to telemetry server

Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>

storage/health.go

@@ -0,0 +1,29 @@
+package storage
+
+import (
+	"fmt"
+	"time"
+)
+
+// NewCustomHealthCheckFunc returns a new health check function.
+func NewCustomHealthCheckFunc(s Storage, now func() time.Time) func() (details interface{}, err error) {
+	return func() (details interface{}, err error) {
+		a := AuthRequest{
+			ID:       NewID(),
+			ClientID: NewID(),
+
+			// Set a short expiry so if the delete fails this will be cleaned up quickly by garbage collection.
+			Expiry: now().Add(time.Minute),
+		}
+
+		if err := s.CreateAuthRequest(a); err != nil {
+			return nil, fmt.Errorf("create auth request: %v", err)
+		}
+
+		if err := s.DeleteAuthRequest(a.ID); err != nil {
+			return nil, fmt.Errorf("delete auth request: %v", err)
+		}
+
+		return nil, nil
+	}
+}