save timestamps in env vars #110

Job	Run time
basics	3m 47s
tests	27s
asan	1m 6s
nextest_with_coverage	38s
define-matrix	2s
bench (q146_lru_cache, bench_intrusive_two_hashmaps)	1m 20s
miri (q146_lru_cache)	3m 52s
bench (q146_lru_cache, bench_two_hashmaps)	1m 19s
miri (q1829_maximum_xor_for_each_query)	42s
bench (q146_lru_cache, bench_vec_hashmap)	1m 39s
miri (q42_trapping_rain_water)	40s
bench (q146_lru_cache, bench_priority_queue)	1m 37s
miri (q2_add_two_numbers)	44s
miri (q1_two_sum)	44s
miri (q88_merge_sorted_array)	46s
miri (q460_lfu_cache)	3m 29s
miri (q1574_shortest_subarray_to_be_removed_to_make_array_sorted)	45s
miri (q1248_count_num_of_nice_subarrays)	42s
update-dashboard-time-range	28s
	24m 47s

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