feat: allow event loop to be uvloop

[EvanR-Dev]

Description

https://github.com/MagicStack/uvloop

UnixSelectorEventLoop (current worker loop) vs Uvloop

Test 1: 10k reqs, 50 UVs Unix Total: 19.4 s total Avg: 96.95 ms Median: 95.45 ms p(95): 106.34 ms RPS: 515

Uvloop Total: 17.7 s total Avg: 87.99 ms Median: 87.79 ms p(95): 95.99 ms RPS: 565

Test 2: Number requests in 5 minutes, 100 VUs Unix Total: 157,580 reqs completed Avg: 190.35 ms Median: 189.89 ms p(95): 206.88 ms RPS: 525

Uvloop Total: 167,928 reqs completed Avg: 178.58 ms Median: 178.21 ms p(95): 195.29 ms RPS: 560

Test 3: Number requests in 5 minutes, 500 VUs, with simulated parallelism for each request (5 concurrent tasks via asyncio.gather) Unix Total: 216,212 reqs completed Avg: 694.03 ms Median: 693.09 ms p(95): 814.89 ms 0.15% failed requests (no 200) RPS (success only): 720

Uvloop Total: 231,878 reqs completed Avg: 647.01 ms Median: 643.42 ms p(95): 737.38 ms 0.12% failed requests (no 200) RPS (success only): 772

Test 1 improvement: 8.76% faster Test 2 improvement: 6.57% more reqs Test 3 improvement: 7.24% more reqs

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