⚡ Bolt: Execute external network requests concurrently

[Snigdh41]

What: Replaced sequential resend.emails.send() await calls with a concurrent Promise.all() execution batch in the contact API worker.
Why: Sequential network requests accumulate latency unnecessarily. In short-lived serverless environments like Cloudflare Workers, total execution time must be minimized to prevent blocking, reduce cold starts, and optimize billing.
Impact: Reduces the time spent sending emails significantly by executing both the notification and auto-reply external requests in parallel, halving the network roundtrip delay for this operation.
Measurement: Review Cloudflare Worker execution time metrics to verify a reduction in total duration for the /contact POST endpoint.

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PR created automatically by Jules for task 10050456551560907068 started by @Snigdh41

[google-labs-jules]

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