resource: conditionally monitor sdmon.idle #2540

Job	Run time
spelling	5s
validate commits	0s
Generate build matrix	11s
python linting	34s
bookworm - test-install	12m 20s
bookworm - 32 bit	13m 51s
noble - test-install	13m 28s
el9 - test-install	12m 24s
alpine - test-install	13m 54s
fedora40 - test-install	12m 5s
jammy - test-install	12m 16s
focal - py3.8	17m 40s
bookworm - gcc-12,content-s3,distcheck	20m 15s
fedora40 - clang-18	16m 53s
coverage	25m 6s
el8 - ascii	20m 3s
el8 - test-install	13m 26s
el8 - system,coverage	7m 7s
inception	22m 32s
flux-accounting check	4m 48s
flux-sched check	6m 56s
macos build only	4m 17s
flux-pmix check	12m 29s
flux-pam check	4m 4s
Generate docker manifest	1s
	4h 26m 45s

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