fix multiple issues in the `flux job attach` statusline #9848

Job	Run time
validate commits	26s
Generate build matrix	10s
python linting	28s
spelling	5s
bookworm - test-install	42s
bookworm - 32 bit	42s
noble - test-install	41s
el9 - test-install	45s
alpine - test-install	42s
fedora40 - test-install	40s
jammy - test-install	39s
focal - py3.8	39s
bookworm - gcc-12,content-s3,distcheck	42s
fedora40 - clang-18	39s
coverage	41s
el8 - ascii	41s
el8 - test-install	41s
el8 - system,coverage	40s
inception	39s
flux-accounting check	25s
flux-pam check	1s
flux-sched check	1s
flux-pmix check	23s
Generate docker manifest	1s
	12m 13s

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