fix: don't drop role_mentions when hydrating messages (#181)

`hydrateInternal` resolves incoming payload keys using `keyMapping[key] ?? key` before invoking `functions[targetKey]`. Because `keyMapping` included entries for `mentions` and `replies` but missed `role_mentions`, the target key remained as its raw API string (`role_mentions`). Since no matching handler function existed under that name, it threw an error that was silently caught and logged as "Skipping key ... during hydration!".

Because of this missing mapping, `roleMentionIds` was never populated during hydration and its extractor function went completely unused. Any code relying on it received `undefined`. Specifically, `Message.mentioned` checks `roleMentions?.some((role) => role.assigned)`, which meant it could never return true for role-based mentions.

Adding `role_mentions` to the key mapping allows the existing extractor function to run as intended.

Signed-off-by: Aki <aki@akiworks.xyz>

Author: GalaxyAkiii

src/hydration/message.ts

@@ -40,6 +40,7 @@ export const messageHydration: Hydrate<Merge<Message>, HydratedMessage> = {
     system: "systemMessage",
     edited: "editedAt",
     mentions: "mentionIds",
+    role_mentions: "roleMentionIds",
     replies: "replyIds",
   },
   functions: {