ci(zephyr-e2e): install pyelftools for Zephyr build scripts

West build failed with ModuleNotFoundError: elftools; Zephyr gen_kobject_list.py needs pyelftools in WEST_PYTHON venv.

Made-with: Cursor

Author: Alex J Lennon

.github/workflows/zephyr-e2e.yml

@@ -66,7 +66,8 @@ jobs:
         run: |
           python3 -m venv .venv-west
           ./.venv-west/bin/pip install -U pip
-          ./.venv-west/bin/pip install west
+          # pyelftools: required by Zephyr build scripts (gen_kobject_list.py imports elftools).
+          ./.venv-west/bin/pip install west pyelftools
           echo "${{ github.workspace }}/.venv-west/bin" >> "$GITHUB_PATH"
 
       - uses: dtolnay/rust-toolchain@stable

CONTRIBUTING.md

@@ -101,7 +101,7 @@ RUN_E2E_ZEPHYR_NATIVE=1 ./scripts/validate_local.sh
 ### GitHub Actions (optional E2E parity)
 
 - **GDB smoke** — the **CI** workflow includes an Ubuntu job that runs `scripts/e2e_gdb_smoke.sh` after `cargo build --release` (same idea as `RUN_E2E_GDB=1` with `validate_local.sh`, without duplicating fmt/clippy/doc in that job).
-- **Zephyr `native_sim`** — the **Zephyr E2E** workflow (`.github/workflows/zephyr-e2e.yml`) provisions a cached west workspace, then runs `scripts/e2e_zephyr_native_sim.sh`. It runs when `scripts/e2e_zephyr_native_sim.sh` or `scripts/zephyr_multi_printf_app/` change, on pushes to `main`/`develop` for those paths, on a weekly schedule, and via **workflow_dispatch** (Actions → Zephyr E2E → Run workflow). This mirrors `RUN_E2E_ZEPHYR_NATIVE=1` locally without checking a Zephyr tree into this repo. The workflow builds **`target/debug/rsgdb`** (not release) and frees some preinstalled SDKs on the runner so the job fits on the GitHub-hosted disk.
+- **Zephyr `native_sim`** — the **Zephyr E2E** workflow (`.github/workflows/zephyr-e2e.yml`) provisions a cached west workspace, then runs `scripts/e2e_zephyr_native_sim.sh`. It runs when `scripts/e2e_zephyr_native_sim.sh` or `scripts/zephyr_multi_printf_app/` change, on pushes to `main`/`develop` for those paths, on a weekly schedule, and via **workflow_dispatch** (Actions → Zephyr E2E → Run workflow). This mirrors `RUN_E2E_ZEPHYR_NATIVE=1` locally without checking a Zephyr tree into this repo. The workflow builds **`target/debug/rsgdb`** (not release), frees some preinstalled SDKs on the runner, and installs **`pyelftools`** in the west venv (Zephyr’s `gen_kobject_list.py` imports `elftools`).
 
 ### Issue tracking