nigiri: force stop times to be monotonic increasing #373

Job	Run time
openapi-validate	17s
formatting	49s
msvc (Debug)	4m 59s
linux (linux-amd64-release, linux-amd64)	1m 13s
msvc (Release)	4m 59s
linux (clang-tidy)	2m 24s
linux (linux-sanitizer)	2m 21s
macos (macos-x86_64, On)	5m 13s
linux (linux-debug, valgrind --suppressions=deps/osr/docs/tbb.supp --suppressions=deps/osr/docs/p...	4m 31s
ui	34s
macos (macos-arm64)	5m 13s
docker	1s
	32m 34s

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