ref: Remove some useless asyncio.to_thread

[cbornet]

Remove some useless asyncio.to_thread

[codspeed-hq]

CodSpeed Performance Report

Merging #5149 will degrade performances by 27.18%

_{Comparing cbornet:remove-to_thread (3fbfb64) with main (0b39554)}

Summary

⚡ 4 improvements
❌ 3 regressions
✅ 8 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	cbornet:remove-to_thread	Change
⚡	test_create_starter_projects	1,263.6 ms	661.8 ms	+90.93%
❌	test_get_and_cache_all_types_dict	896.9 µs	1,014.6 µs	-11.6%
⚡	test_initialize_services	711 ms	154.4 ms	×4.6
⚡	test_initialize_super_user	957.7 ms	160.8 ms	×6
⚡	test_setup_llm_caching	106.8 ms	1.4 ms	×79
❌	test_successful_run_with_input_type_any	184.9 ms	253.9 ms	-27.18%
❌	test_successful_run_with_output_type_any	196.9 ms	243.8 ms	-19.24%