Paired correctness release from the 2026-04-08 cross-SDK compliance
review. Seven clusters (C1, A2–A7) addressing 47 findings across
primitives, script, transaction, BEEF, crypto, interpreter, and wallet
layers.

Version bumps:
  bsv-sdk:            0.8.2 → 0.9.0
  bsv-wallet:         0.3.4 → 0.4.0
  bsv-wallet dep:     >= 0.8.2 → >= 0.9.0 (bsv-sdk floor)
  wallet-postgres dep: >= 0.3.4 → >= 0.4.0 (bsv-wallet floor)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>