feat: add walltime clock benchmarking

[art049]

• chore: fix utils test using a fake git repo
• refactor: create an abstraction for each instrument

[codspeed-hq]

CodSpeed Performance Report

Merging #41 will degrade performances by 2.49%

_{Comparing cod-25-collect-pytest-benchmark-json-data-with-the-cliaction (31f57ad) with master (9b258d8)}

Summary

⚡ 5 improvements
❌ 1 (👁 1) regressions
✅ 14 untouched benchmarks

Benchmarks breakdown

	Benchmark	master	cod-25-collect-pytest-benchmark-json-data-with-the-cliaction	Change
⚡	test_make_allpass	38.1 µs	36.6 µs	+4.14%
⚡	test_make_bandpass	38.2 µs	37.2 µs	+2.77%
⚡	test_make_lowshelf	43.5 µs	42.6 µs	+2.17%
⚡	test_process	32.6 µs	31.1 µs	+4.95%
⚡	test_noop_lambda_decorated	19.6 µs	18.9 µs	+3.94%
👁	test_noop_pass	12 µs	12.3 µs	-2.49%