duplicate-bodies red on master: 3 unbleseed fixture bodies from #6789 block every open PR #6831

Master-wide red on the required duplicate-bodies check.

Every open PR now fails duplicate-bodies with the same three names:

::error::a body written under carries_src2 is now copied [2] time(s) and was in no ledger
::error::a body written under sample_imm is now copied [2] time(s) and was in no ledger
::error::a body written under sample_reg is now copied [2] time(s) and was in no ledger

Verified on pure origin/master (345dcbb): python3 tools/dupe_scan.py prints exactly these three errors. The copies live in specs/isa/t27a.t27 and specs/compiler/theory/isa_round_trip.t27, both introduced by #6789 (t27a MVP). PR branches that do not touch either file (e.g. #6695) inherit the red.

The copies are deliberate: isa_round_trip.t27 is the round-trip theory spec and its fixtures must be self-contained bodies, so reuse across files is not the right fix here. The sanctioned path is to record them in the ledger in the same commit that introduces them -- #6789 skipped that step.

Fix: python3 tools/dupe_scan.py --bless. The ledger diff is exactly three lines (carries_src2 2, sample_imm 2, sample_reg 2); every pre-existing group is byte-identical, so the ratchet moves up only by the three #6789 groups and nothing shrinks or hides.