certain instances of public_flags are sent as the wrong data type

[gizmogoat]

Describe the bug
The public_flags (and perhaps other) parameters when sent to connecting clients over the Gateway websocket and certain API endpoints like api/v9/channels/channelId/webhooks are sent as strings and not ints.
So, when using DiscordGo, it complains about public_flags being a string.

To Reproduce
Steps to reproduce the behavior:

1. Do anything that tries to deserialize these fields into an int. (i.e. DiscordGo)

Expected behavior
Sent value is an int. Library/client/bot does not complain about the data types

Console Logs
Feb 23 11:43:11 sike matterbridge[2246857]: 2026/02/23 11:43:11 [DG0] wsapi.go:646:onEvent() error unmarshalling MESSAGE_CREATE event, json: cannot unmarshal string into Go struct field User.message.author.public_flags of type discordgo.UserFlags

System Information (please complete the following information):

• OS: Ubuntu
• Version (If not applicable skip): 24.04
• Node Version: 24.13.1
• Python 3 Version: Python 3.13.12

Env and Software info

• Release: nightly
• Branch (if release is not applicable): master
• Commit Hash (if release is not applicable): 785f53e
• Database: 16.11
• Reverse Proxy: cloudflared
• Thread Count: default

[gizmogoat]

I have now discovered this also affects the api/v9/channels/channelId/webhooks endpoint and have updated the issue accordingly. Could possibly be a problem elsewhere too

[TheArcaneBrony]

@whinis it seems the JsonNumber attribute isn't working here?

[whinis]

Looking into this, finally have some freetime after a trip this weekend

[whinis]

#1561 This should fix that