⚡ Bolt: Concurrent email dispatch in contact API

[Snigdh41]

💡 What: Batched the two Resend email dispatches (notification and auto-reply) to execute concurrently using Promise.all() instead of awaiting them sequentially.
🎯 Why: Sequential external API calls in a Cloudflare Worker unnecessarily stack latency, extending the total request execution time for the user.
📊 Impact: Reduces the latency of the email sending phase by approximately 50%, resulting in a faster response time for the contact form submission.
🔬 Measurement: Profile the execution time of the /contact API endpoint before and after the change; the total duration of the resend.emails.send operations will be roughly equal to the longest single request rather than the sum of both.

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PR created automatically by Jules for task 12627164246367957012 started by @Snigdh41

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