fix: allow agent workspace directories in media local roots (#17136)

Merged via /review-pr -> /prepare-pr -> /merge-pr.

Prepared head SHA: 7545ef1e19
Co-authored-by: MisterGuy420 <255743668+MisterGuy420@users.noreply.github.com>
Co-authored-by: gumadeiras <5599352+gumadeiras@users.noreply.github.com>
Reviewed-by: @gumadeiras

src/discord/send.outbound.ts

@@ -39,6 +39,7 @@ type DiscordSendOpts = {
   token?: string;
   accountId?: string;
   mediaUrl?: string;
+  mediaLocalRoots?: readonly string[];
   verbose?: boolean;
   rest?: RequestClient;
   replyTo?: string;
@@ -140,6 +141,7 @@ export async function sendMessageDiscord(
           threadId,
           mediaCaption ?? "",
           opts.mediaUrl,
+          opts.mediaLocalRoots,
           undefined,
           request,
           accountInfo.config.maxLinesPerMessage,
@@ -203,6 +205,7 @@ export async function sendMessageDiscord(
         channelId,
         textWithTables,
         opts.mediaUrl,
+        opts.mediaLocalRoots,
         opts.replyTo,
         request,
         accountInfo.config.maxLinesPerMessage,