Update the password schema.

Passwords are now `OptionInt32`: `none` to indicate non-copyable levels,
`some` to indicate copyable levels: `-1` if the password is not set,
otherwise the password as an integer.

Author: nekitdev

gd/schema/aliases/password.capnp

@@ -0,0 +1,5 @@
+@0x9e4beb9fe3fa5e84;
+
+using import "../option.capnp".OptionInt32;
+
+using Password = OptionInt32;

gd/schema/api/level.capnp

@@ -5,6 +5,7 @@ using import "../aliases/enum.capnp".EnumValue;
 using import "../aliases/flag.capnp".FlagValue;
 using import "../aliases/id.capnp".Id;
 using import "../aliases/id.capnp".TimelyId;
+using import "../aliases/password.capnp".Password;
 using import "../aliases/progress.capnp".Progress;
 using import "../aliases/record.capnp".OptionRecord;
 using import "../aliases/statistics.capnp".Attempts;
@@ -21,7 +22,6 @@ using import "../aliases/time.capnp".Duration;
 using import "../aliases/version.capnp".Revision;
 using import "../aliases/version.capnp".Version;
 using import "../option.capnp".Option;
-using import "../password.capnp".Password;
 using import "../song.capnp".SongReference;
 using import "../user.capnp".UserReference;
 using import "aliases/id.capnp".FolderId;

gd/schema/level.capnp

@@ -4,6 +4,7 @@ using import "aliases/capacity.capnp".Capacity;
 using import "aliases/enum.capnp".EnumValue;
 using import "aliases/id.capnp".Id;
 using import "aliases/id.capnp".TimelyId;
+using import "aliases/password.capnp".Password;
 using import "aliases/statistics.capnp".Downloads;
 using import "aliases/statistics.capnp".ObjectCount;
 using import "aliases/statistics.capnp".Rating;
@@ -16,7 +17,6 @@ using import "aliases/time.capnp".TimeSteps;
 using import "aliases/version.capnp".Version;
 using import "eitherReward.capnp".EitherReward;
 using import "option.capnp".Option;
-using import "password.capnp".Password;
 using import "song.capnp".SongReference;
 using import "user.capnp".UserReference;
 
@@ -42,7 +42,7 @@ struct Level {
     requestedReward @13 :EitherReward;
     score @14 :Score;
     rateType @15 :EnumValue;
-    password @16 :Option(Password);
+    password @16 :Password;
     originalId @17 :Id;
     twoPlayer @18 :Bool;
     capacity @19 :Option(Capacity);