feat: container-based Bitwarden CLI using native Rust binary (no Node.js)

Replace the Node.js @bitwarden/cli dependency with the pre-compiled
native Rust binary (v2026.7.0) for CMMC/ITAR/STIG audit readiness.
The Node.js dependency tree was a significant attack surface that
would fail security audits.

Infrastructure:
- docker/bw-native/Dockerfile: minimal debian-slim + native bw binary
- scripts/bw-cli.sh: host wrapper handling full auth lifecycle
  (config, API-key login, unlock, sync) inside the container
- scripts/bw-entrypoint.sh: container entrypoint for auth lifecycle
- scripts/bw-install.sh: one-command installer (download, build, deploy)

Root causes fixed:
- ~/.config/bw/env values now single-quoted (master password has $
  chars that shell expansion corrupted, truncating 32→16 chars)
- Added BW_SERVER for self-hosted instance (pwvault.turnsys.com)
- Entrypoint bw config server tolerates re-run (|| true)

All scripts pass shellcheck with zero warnings including info-level.
Verified: bw status (unlocked, coo@turnsys.com), generate, list items.

💘 Generated with Crush

Assisted-by: Crush:glm-5.2

docker/bw-native/.gitignore

@@ -0,0 +1 @@
+bw