dupe-ledger: bless log_frame copied by particle_engine (#10310) after #10312 #10315

Goal

duplicate-bodies is red on master at 4414941: a body written under log_frame is now copied [2] time(s) and was in no ledger. #10310 added specs/t27f/particle_engine.t27, whose log_frame has the same body as the one in specs/t27f/particle_field.t27. #10312 blessed the ledger before #10310 merged, so this copy is in no ledger. Every PR based on master now fails the check (for example #10314).

Boundary

• tools/duplicate_bodies_baseline.txt: the one line log_frame 2, written by python3 tools/dupe_scan.py --bless.
• Not in scope:
  • merging the two log_frame bodies into one shared helper (the spec owners' call);
  • any other ratchet.

Scenarios

• Given master with this ledger, When python3 tools/dupe_scan.py runs, Then it exits 0.
• Given a spec that copies another known body, When the scan runs, Then it still fails.

Requirements

• FR-001: The ledger MUST be the tool's --bless output, not hand-edited.
• FR-002: The change MUST add exactly one group and change no existing count.

Success Criteria

• duplicate-bodies is green on master and on PRs based on it.

Close criteria

• The PR merges, and master's duplicate-bodies check passes.