MnemosyneC v0.9.4

BP134 v0.9.4 -- Hot substrate from install: MnemosyneC now ships the 14-category Chocolate Pack (pre-seeded verified eblets) so the 12-Blade Plow starts WARM on first launch, plus the per-domain question banks for deep field-sowing. Adds a deep-harvest mode, the field-sowing runner, a 14x5=70 MMLU-Pro Prove-It preset with an exportable third-party-verifiable receipt, consent-gated automatic updates (Diagnostic tab, OFF by default), and node-to-node update propagation (peer binaries SHA-256-verified against the canonical manifest before install). Builds on v0.9.3's plow voter think:false fix. Unsigned build. SHA-256: CDD161E0063313015057CC26D9A98C687ED401F1909837EEA758643AD0820557