28-task implementation review across alknet-vault, alknet-core, alknet-call. Zero critical findings; 4 warnings (W1: AbortCascade implemented but never invoked by CallAdapter; W2: endpoint hard-codes tls_client_fingerprint=None; W3: Mnemonic Debug leaks seed phrase; W4: ApiKeyEntry missing resources field); 5 suggestions. Build clean, 332 tests pass, default clippy clean.