Closes#48, #52
## Summary
- Replace the envoy-gateway-based TLS setup with inline PKI generation during cluster bootstrap, generating CA, server, and client certificates directly in the `navigator-bootstrap` crate
- Remove all envoy gateway Helm templates (`gateway.yaml`, `gatewayclass.yaml`, `grpcroute.yaml`, PKI job, traffic policies) and the `Dockerfile.pki-job`
- Add native mTLS support to the navigator server with `tokio-rustls`, mounting client TLS certs as volumes into sandbox pods
- Update cluster entrypoint, healthcheck, and deploy scripts to work with the new direct-TLS architecture
- Add TLS security e2e test and fix formatting/clippy warnings
## Test Plan
- All unit tests pass (`cargo test --workspace`)
- Clippy clean (`cargo clippy --workspace --all-targets`)
- Format clean (`cargo fmt --all -- --check`)
- Python tests pass (`uv run pytest python/`)
- Full `mise run pre-commit` passes
## Summary
- Add `Provider` entity for managing 3p deps from a sandbox
- Add provider CRUD API/server persistence and new CLI workflows (`nav provider create/get/list/update/delete`), including `--from-existing` laptop discovery.
- Integrate providers into sandbox create flow: infer from command (`-- claude`), support repeatable `--provider <type>`, prompt before auto-create, and allow manual in-sandbox setup.
- Add a dedicated `navigator-providers` crate with per-provider modules and mockable discovery test helpers.
## Key UX Changes
- `nav sandbox create --provider gitlab -- claude`
- Missing provider prompt now asks before creating from local state.
- `nav provider list --names` for scripting/cleanup.
## Test Plan
- `mise run cluster:deploy`
- `mise run test:e2e:sandbox`
- `mise run pre-commit`
Closes#19Closes#22Closes#11
Drew Newberry