Add fetch timeout to prevent email sending hangs

[Copilot]

The fetchLogoAsBase64 function could hang indefinitely on unresponsive servers, blocking email delivery.

Changes

• Added 10-second timeout using AbortController on fetch operation
• Timeout cleanup moved to finally block to prevent memory leaks
• Falls back to original URL on timeout (existing error handling)

const controller = new AbortController();
const timeoutId = setTimeout(() => controller.abort(), 10000);

try {
  const response = await fetch(url, { signal: controller.signal });
  // ... process response
} catch (error) {
  return url; // fallback
} finally {
  clearTimeout(timeoutId);
}

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[Anmol1696]

@copilot can you resolve the conflicts, i changed the base branch though