test(server): reproduce issue 24098 terminal branch PR sweeps rereading git state

Tests adapted from #24099. They fail on main because both once-a-minute
sweeps confirm a remembered merged answer with fresh git reads.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
a403d94aeaJulius Marminge committed on 10/24/2026, 10:32:33 AMparent27e0c68
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