Refs: offline install via vendored wheels and test verification workflow (see README/playbook updates)

vendor/PROVENANCE.md

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+# Dependency Provenance
+
+All wheels generated on: 2026-01-07 17:06:51 UTC
+Python version: 3.12
+Build machine: Darwin arm64
+Docker used: Yes (python:3.12-slim)
+
+## Platforms
+- macOS ARM64: Built using .venv312 (Python 3.12)
+- Linux x86_64: Built using Docker python:3.12-slim
+
+## Package Versions
+base58==2.1.1
+bip_utils==2.10.0
+build==1.3.0
+cbor2==5.8.0
+cffi==2.0.0
+click==8.3.1
+coincurve==21.0.0
+crcmod==1.7
+cryptography==46.0.3
+ecdsa==0.19.1
+ed25519-blake2b==1.4.1
+iniconfig==2.3.0
+packaging==25.0
+PGPy==0.6.0
+pip-chill==1.0.3
+pip-tools==7.5.2
+pluggy==1.6.0
+py-sr25519-bindings==0.2.3
+pyasn1==0.6.1
+pycparser==2.23
+
+## Integrity Verification
+Each platform directory contains SHA256SUMS for verification:
+```bash
+cd vendor/linux-x86_64
+shasum -a 256 -c SHA256SUMS
+```
+
+Last updated: 2026-01-07
+Built by: LC mac <leochan@hkjin.com>
+Commit: 2807982