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/infra/heartbeat-runner.ts

@@ -532,6 +532,7 @@ export async function runHeartbeatOnce(opts: {
       to: delivery.to,
       accountId: delivery.accountId,
       payloads: [{ text: heartbeatOkText }],
+      agentId,
       deps: opts.deps,
     });
     return true;
@@ -710,6 +711,7 @@ export async function runHeartbeatOnce(opts: {
       channel: delivery.channel,
       to: delivery.to,
       accountId: deliveryAccountId,
+      agentId,
       payloads: [
         ...reasoningPayloads,
         ...(shouldSkipMain