docs(examples): add builder-adversary-deferred — verify after a long segment

Coarsest review cadence: the Builder self-certifies the build phases and the
Adversary does ONE comprehensive cold-verification of the whole accumulated build
in a final `review` phase (vs orig per-phase, lean per-gate). Full original
prompts + a DEFERRED REVIEW CADENCE override, so it isolates verification cadence.
Cheapest coordination; the trade-off is the independent check arrives late (late
rework risk + self-certification drift on build phases). README spells it out.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

examples/builder-adversary-deferred/prompts/kickoff.md

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+*** PHASE {phase_id} ***
+SINGLE SOURCE OF TRUTH for this phase: {plan} — read it in full now. It defines this phase's mission and its Definition of Done (DoD).
+Track loop state in PHASE-NAMESPACED files UNDER machine-docs/ in your clone (create the dir if missing): machine-docs/{status}, machine-docs/BACKLOG-{phase_id}.md, machine-docs/REVIEW-{phase_id}.md, machine-docs/JOURNAL-{phase_id}.md. machine-docs/DECISIONS.md is shared (append-only).
+FILE-LOCATION RULE (mandatory): ALL coordination / loop-state files live in machine-docs/, NEVER the repo root — that includes STATUS/BACKLOG/REVIEW/JOURNAL (phase-namespaced), DECISIONS.md, and the ADVERSARY-INBOX.md / BUILDER-INBOX.md side-channels. If you ever find one at the root, git mv it into machine-docs/.
+"Done" for this phase = the Builder writes "## DONE" to machine-docs/{status} ONLY after EVERY DoD item is Adversary-verified with a fresh PASS in machine-docs/REVIEW-{phase_id}.md (handshake below).
+Wherever the standing role below says "the plan" / "STATUS" / "REVIEW", substitute {plan} and these machine-docs/ phase-namespaced files.
+
+=== standing role & rules ===