CI: Add Docker Compose setup for CI environment

- Create docker-compose.ci.yml with Python 3.9 environment
- Add CI entrypoint script for dependency installation
- Configure pip cache volume for faster builds
- Include benchmark service configuration for future use
- Update .gitignore to allow CI entrypoint script

🤖 Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>

Author: dugshub

.docker/ci-entrypoint.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+set -e
+
+# Install system dependencies quietly
+apt-get update -qq
+apt-get install -y -qq make > /dev/null 2>&1
+
+# Install Python dependencies quietly
+pip install -q -e . 2>/dev/null
+pip install -q mypy pytest pytest-asyncio pytest-cov black ruff 2>/dev/null
+
+# Execute the passed command
+exec "$@"

.gitignore

@@ -176,3 +176,8 @@ Desktop.ini
 *.swp
 *.swo
 *~.cli_patterns_history
+
+# CI artifacts
+/tmp/
+benchmark_results.json
+# .docker/  # Commented out to allow CI entrypoint script

docker-compose.ci.yml

@@ -0,0 +1,26 @@
+services:
+  ci:
+    image: python:3.9-slim-bookworm
+    environment:
+      - PYTHONPATH=src
+      - CI=true
+    volumes:
+      - .:/workspace
+      - pip-cache:/root/.cache/pip
+    working_dir: /workspace
+    entrypoint: ["/workspace/.docker/ci-entrypoint.sh"]
+
+  # For performance regression testing (future)
+  benchmark:
+    extends: ci
+    cpus: '2.0'
+    mem_limit: 4g
+    memswap_limit: 4g
+    environment:
+      - PYTHONPATH=src
+      - CI=true
+      - BENCHMARK_MODE=true
+
+volumes:
+  pip-cache:
+    driver: local