feat(misc): add adversarial self-verification notebook to cut false positives

Teaches 3-stage pattern: Generator (Sonnet) → 3 parallel adversarial
verifiers (Haiku with anti-sycophancy prompts) → Synthesis with critique
embedded in regeneration prompt. Majority-vote arbitration (2/3 threshold).
Includes side-by-side sycophantic vs adversarial prompt comparison.

Closes #713

Built by Rudrendu Paul, developed with Claude Code

Author: RudrenduPaul