docs(board): rebase ARCHITECTURE_ENTROPY_LEDGER onto current main (post-#353); append 2026-05-07 CYCLE-ACCUM-1 + LADYBUG-EQUIV-1 + crate inventory 22→23

Rebases the ledger so it begins with current main's content (commit
a6797ad with all six 2026-05-06/2026-05-07 dated sections from PRs
#345/#346/#347/#348) and then appends a single dated section
"2026-05-07 — CYCLE-ACCUM-1 + LADYBUG-EQUIV-1 introductions + crate
inventory expansion (post-#353)" containing only the unique findings
not already absorbed by those merged PRs:

- CYCLE-ACCUM-1 row introduction (per-cadence flush gate, R2,
  shipped via PR #337, entropy 2)
- LADYBUG-EQUIV-1 row introduction (ladybug-rs ↔ lance-graph
  equivalence map; harvest is empty, entropy 1, full mapping table
  for clam_path, nsm_substrate, sentence_crystal, spo_harvest,
  causal_trajectory, gestalt, nsm_primes, crystal_lm, dn-tree)
- Crate inventory expanded 22 → 23 (sigker added by PR #348)
- Cross-references include PR #109 medcare-rs (?source=lance
  toggle exercising per-request RlsRewriter+ColumnMaskRewriter
  pattern) + PR #353 (palantir-parity-cascade-v2 +
  soa-dto-dependency-ledger)
- Open question flagged: .claude/pattern.md (singular, PR #345)
  vs .claude/patterns.md (plural, this session) filename collision
  awaiting user resolution

State-change blocks for WATCHER-1 / POLICY-1 / MEMBRANE-GATE-1 /
SPLAT-1 are NOT duplicated here — the corresponding 2026-05-06
entries from PR #345/#346 already cover those state changes.
Original branch authoring is preserved at commit 0dd0f56 for
archaeology.

Author: AdaWorldAPI