## Summary
- Fix host command hooks to use the submitter/source directory instead
of a sandbox-only working directory.
- Introduce `HookExecutionContext` and `RunLocations` so host source,
sandbox work, and run scratch paths are explicit.
- Route lifecycle hooks and tool hooks through the shared hook execution
context instead of rebuilding cwd pairs at call sites.
## Test Plan
- `cargo nextest run -p fabro-hooks`
- `cargo check -p fabro-workflow --tests`
- `cargo +nightly-2026-04-14 fmt --package fabro-hooks --package
fabro-workflow --check`
- `cargo +nightly-2026-04-14 clippy -p fabro-hooks -p fabro-workflow
--all-targets -- -D warnings`
---------
Co-authored-by: Jess Martin <jessmartin@gmail.com>
