fix(discord): clamp shared limit subBlock to 1-50 for pinned messages

The limit subBlock is shared between discord_get_messages (max 100)
and discord_get_pinned_messages (max 50 per Discord's API), so a
value carried over from the messages operation could exceed the pins
endpoint's max and trigger a 400. Clamp at both the block dispatcher
and the tool's request builder.

Author: waleedlatif1

apps/sim/blocks/blocks/discord.ts

@@ -718,7 +718,7 @@ export const DiscordBlock: BlockConfig<DiscordResponse> = {
             return {
               ...commonParams,
               channelId: params.channelId,
-              ...(params.limit && { limit: Number(params.limit) }),
+              ...(params.limit && { limit: Math.min(Math.max(1, Number(params.limit)), 50) }),
               ...(params.before?.trim() && { before: params.before.trim() }),
             }
           case 'discord_add_reaction':

apps/sim/tools/discord/get_pinned_messages.ts

@@ -46,7 +46,7 @@ export const discordGetPinnedMessagesTool: ToolConfig<
   request: {
     url: (params: DiscordGetPinnedMessagesParams) => {
       const query = new URLSearchParams()
-      if (params.limit) query.set('limit', String(params.limit))
+      if (params.limit) query.set('limit', String(Math.min(Math.max(1, Number(params.limit)), 50)))
       if (params.before) query.set('before', params.before)
       const queryString = query.toString()
       return `https://discord.com/api/v10/channels/${params.channelId.trim()}/messages/pins${queryString ? `?${queryString}` : ''}`