tests fail after 2026-10-05

While working on reproducible builds for openSUSE, I found that our sequoia-sq 1.1.0 package fails 13 tests after 2026-10-05 in tests/integration/sq_pki.rs

Adding let sqwot_args = &["--time", "20250202"]; in multiple places can avoid the failure, but you might want to fix the root cause or avoid code-duplication.

Background: As part of my work on reproducible builds for openSUSE, I check that software still gives identical build results in the future. The usual offset is +16 years, because that is how long I expect some software will be used in some places. This showed up failing tests in our package build.