Turn-attractor rebuilt on real messaging: two live defects found and fixed before the full campaign (FABRIC-3.md §XXI)

Rewrote EXEC-STD79-DOE-CD's dispatch to coordinate via MSG-SEND/
MSG-TICK instead of blocking VM-EXEC, now that Hera can genuinely
message (§XX). RUN-TEST/EXEC-STD79-DOE (the serialized baseline) are
untouched, kept as a byte-for-byte-reproducible historical comparison
point.

A small 2-identity smoke test before any multi-architecture
commitment caught two real defects the design alone didn't predict:

1. Absolute VM-HEAT can't produce fine-grained interleaving -- a
   fresh identity starts at heat=0 against Hera's ~62000+, a gap no
   1..24 divisor closes, so priority locked onto whichever identity
   had executed least, for its entire campaign. Fixed with BASE-HEAT:
   each identity's heat is snapshotted once at campaign start, and
   priority is computed from heat gained *this campaign*, not
   lifetime heat.

2. Single-test-per-message granularity silently drops most of a
   campaign's data: MSG-SEND no-ops on MSG-ALLOC failure, and the
   turn bookkeeping advanced regardless, so rows looked complete
   while missing most of their tests. A live reservoir probe showed
   Hera's own STADIUM-RES@ draining ~725/cycle with no
   replenishment observed -- a 648-send full campaign would exhaust
   it almost immediately. Fixed by dispatching a whole rep (24 tests,
   one concatenated command, measured 442 bytes, well under
   VM-EXEC's 1025-byte cap) per message instead -- 27 sends for a
   full campaign, not 648.

Re-verified after both fixes: 99/99 expected test outputs present,
zero drops, zero faults, genuine rep-level interleaving instead of
either the serialized baseline's fixed order or the first cut's
72-test lock-in.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EXieurDfDSsDFdnSyusuWo

experiments/bare_metal/runs/doe-amd64-20260912-145854.csv

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