refactor: align build system with container-packaging-tools (#44)

Simplify the build system to match the cleaner pattern used in
container-packaging-tools, eliminating sources of CI failures.

Changes:
- Replace Dockerfile.debtools with Dockerfile.devtools (Bookworm base,
  non-root user, system-wide uv installation)
- Replace docker-compose.debtools.yml with docker-compose.devtools.yml
  (remove env_file dependency, simplify volume mounts)
- Simplify run script: remove _env, _export_unset, dev-env functions
  that caused CI failures with .env file handling
- Rename debtools to devtools for consistency
- Add docker-shell and docker-clean commands
- Fix package-name in workflow: halpi2-daemon → halpid to match
  debian/control

The old build system had multiple failure modes:
1. env_file requiring .env to exist
2. grep failing on comment-only .env files
3. Complex volume mounting with DIR_NAME variable

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <noreply@anthropic.com>

Author: mairas

.github/workflows/main.yml

@@ -8,7 +8,7 @@ jobs:
   build-release:
     uses: hatlabs/shared-workflows/.github/workflows/build-release.yml@main
     with:
-      package-name: halpi2-daemon
+      package-name: halpid
       package-description: 'HALPI2 hardware daemon (Python implementation)'
       apt-component: hatlabs
       runs-on: ubuntu-latest-arm64

docker/Dockerfile.debtools

@@ -0,0 +1,53 @@
+# Development environment for HALPI2-daemon
+#
+# Provides a Debian Bookworm environment with all development and build tools.
+# Used for testing, linting, and Debian package building.
+
+FROM debian:bookworm
+
+# Install system dependencies including Debian packaging tools
+RUN apt-get update && apt-get install -y \
+    python3 \
+    python3-pip \
+    python3-venv \
+    python3-dev \
+    debhelper \
+    dh-python \
+    pybuild-plugin-pyproject \
+    build-essential \
+    fakeroot \
+    devscripts \
+    dpkg-dev \
+    python3-all \
+    python3-setuptools \
+    curl \
+    git \
+    sudo \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create non-root user for development
+ARG USERNAME=builder
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+RUN groupadd --gid $USER_GID $USERNAME \
+    && useradd --uid $USER_UID --gid $USER_GID -m $USERNAME \
+    && echo "$USERNAME ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME
+
+# Install uv system-wide
+RUN curl -LsSf https://astral.sh/uv/install.sh | sh \
+    && mv /root/.local/bin/uv /usr/local/bin/uv \
+    && mv /root/.local/bin/uvx /usr/local/bin/uvx
+
+# Set PATH for all users
+ENV PATH="/usr/local/bin:${PATH}"
+
+# Switch to non-root user
+USER $USERNAME
+
+# Set working directory
+WORKDIR /workspace
+
+# Default command
+CMD ["/bin/bash"]

docker/Dockerfile.devtools

@@ -0,0 +1,23 @@
+services:
+  devtools:
+    build:
+      context: .
+      dockerfile: Dockerfile.devtools
+    image: halpi2-daemon-devtools:latest
+
+    # Mount the project directory
+    volumes:
+      - ..:/workspace
+
+    # Working directory
+    working_dir: /workspace
+
+    # Keep container running for interactive use
+    stdin_open: true
+    tty: true
+
+    # Run as non-root user
+    user: builder
+
+    # Override command for interactive use
+    command: /bin/bash