Add iter.Seq iterators for trust registry (ListSeq), audit log
(EventsSeq, QuerySeq), and approval store (PendingSeq). Use
slices.DeleteFunc in session store, slices.SortFunc in testcmd,
range-over-int in benchmarks.
Co-Authored-By: Gemini <noreply@google.com>
Co-Authored-By: Virgil <virgil@lethean.io>