feat(storage): read only transactions (#6417)

feat(storage): read only transactions for queries (#6415)

* fix: tests

* bastle wie en grosse

* fix(database): scan as callback

* fix tests

* fix merge failures

* remove as of system time

* refactor: remove unused test

* refacotr: remove unused lines

internal/query/certificate_test.go

@@ -138,7 +138,7 @@ func Test_CertificatePrepares(t *testing.T) {
 					return nil, true
 				},
 			},
-			object: nil,
+			object: (*Certificate)(nil),
 		},
 	}
 	for _, tt := range tests {