Add error info and code test for a recently added error

internal/errors/code_test.go

@@ -350,6 +350,11 @@ func TestCode_Both_String_Info(t *testing.T) {
 			c:    QueueIsFull,
 			want: QueueIsFull,
 		},
+		{
+			name: "NotFound",
+			c:    NotFound,
+			want: NotFound,
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {

internal/errors/info.go

@@ -295,4 +295,8 @@ var errorCodeInfo = map[Code]Info{
 		Message: "retry limit exceeded",
 		Kind:    State,
 	},
+	NotFound: {
+		Message: "not found",
+		Kind:    State,
+	},
 }