P3 review: the surface, docs and proofs

Split kernel::entry_flows into entry_movements and flows_of so the
reversal-mirror proof fits CI; prove runs the fast harnesses, prove-slow
the 8 slow ones (own job in scheduled CI), prove-all both. Laws in
verification.md renumbered 1-31 with a table of all 55 harnesses.

MCP docs checked against the 115 tools (about 60 fixes) with a test that
every tool is documented; rules.md cross-references fixed; bookspec
statuses and loader tightened; viewer notes wrap and accounts sort by
code; STATUS.md says P3 is built, cutover pending.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01T3gXMVt7XJPi6ens1or9Dj

examples/p3-party-tin-last4.toml

@@ -14,7 +14,7 @@ the K-1), else its W-9 facts'; the two never disagree. A TIN purged from
 the vault keeps its last four in the books. A party with neither has
 none.
 """
-status = "AUTHORITY"
+status = "CHOICE"
 sources = [
   "Treas. Reg. §301.6109-4(a): a truncated TIN shows the last four digits (wanderbooks docs/spec/sources/irs-truncated-tin.md)",
   "DECISION (owner, 2026-10-15): a party's TIN facts and W-9 facts never disagree (wanderbooks ledger-core parties INVARIANT 2a)",