ICU-747,ICU-748/refactor internal/oplog and internal/perms to use domain errors (#854)

* Refactor internal/oplog to domain errors

* Refactor internal/perms

* Update changelog

internal/errors/code_test.go

@@ -57,6 +57,21 @@ func TestCode_Both_String_Info(t *testing.T) {
 			c:    KeyNotFound,
 			want: KeyNotFound,
 		},
+		{
+			name: "TicketAlreadyRedeemed",
+			c:    TicketAlreadyRedeemed,
+			want: TicketAlreadyRedeemed,
+		},
+		{
+			name: "TicketNotFound",
+			c:    TicketNotFound,
+			want: TicketNotFound,
+		},
+		{
+			name: "Io",
+			c:    Io,
+			want: Io,
+		},
 		{
 			name: "PasswordTooShort",
 			c:    PasswordTooShort,
@@ -87,6 +102,16 @@ func TestCode_Both_String_Info(t *testing.T) {
 			c:    Decrypt,
 			want: Decrypt,
 		},
+		{
+			name: "Encode",
+			c:    Encode,
+			want: Encode,
+		},
+		{
+			name: "Decode",
+			c:    Decode,
+			want: Decode,
+		},
 		{
 			name: "CheckConstraint",
 			c:    CheckConstraint,