fix: show correct status for base steps

[ltalirz]

melt_quench was shown as "running" while still waiting for structure generation.

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...py_api/src/amorphouspy_api/routers/jobs_helpers.py	66.66%	1 Missing ⚠️

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