fix: improve error message when unable to parse walltime results

[art049]

No description provided.

[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #103 will not alter performance

_{Comparing feat/version-validation-compat-layers (1f0f934) with main (2979348)}

Summary

✅ 167 untouched benchmarks

[codspeed-hq]

CodSpeed WallTime Performance Report

Merging #103 will degrade performances by 70%

_{Comparing feat/version-validation-compat-layers (1f0f934) with main (2979348)}

Summary

⚡ 5 improvements
❌ 12 regressions
✅ 137 untouched benchmarks

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

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
❌	build_vec	205 ns	213 ns	-3.76%
❌	large_drop	171.6 µs	182.3 µs	-5.88%
❌	from_elem[2048]	247 ns	256 ns	-3.52%
❌	from_elem[4096]	319 ns	333 ns	-4.2%
❌	from_elem_decimal[2048]	244 ns	255 ns	-4.31%
⚡	generate_combinations[6]	1.3 µs	1.3 µs	+5.22%
❌	graph_coloring[4]	1 µs	1.1 µs	-4.18%
❌	graph_coloring[5]	1.1 µs	1.2 µs	-3.56%
❌	knight_tour[7]	249.2 ms	258.5 ms	-3.6%
❌	n_queens_solver[5]	7.7 µs	9.3 µs	-16.99%
⚡	rat_in_maze[8]	935 ns	902 ns	+3.66%
❌	add_two_integers[(255, 255)]	6 ns	20 ns	-70%
⚡	generate_gray_code[3]	470 ns	450 ns	+4.44%
❌	sleep_100ns	25 µs	49.4 µs	-49.36%
⚡	sleep_100us	123.3 µs	119 µs	+3.6%
❌	sleep_1ns	26.6 µs	34.9 µs	-23.77%
⚡	sleep_1us	41 µs	33.2 µs	+23.39%