The a135252 manifest is historical qualification: it pins the committed
corrected tree at a135252. The guard is correct; the four tests used the
current working tree as the 'pinned' fixture, so 87c3a31's jets.py change
broke them. Fixtures are now materialized from a135252 with git; the
corrected acceptance, baseline rejection, four tamper rejections and the
reversed-header baseline control are unchanged. A new test records that
the guard refuses today's src where it differs from the pin.
Missing history skips with the reason, or fails when
CELERIS_REQUIRE_HISTORY=1 (release gating) via history_unavailable().
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
