chore(make): add integration test and cleanup commands

New make targets:
- test-integration: Run integration tests with verbose output
- test-all: Run all tests including integration
- clean: Remove cache files and __pycache__ directories

Usage:
make test-integration # Integration tests (requires Docker)
make test-all # All tests
make clean # Clean up caches

Makefile

@@ -1,4 +1,4 @@
-.PHONY: install test lint format check all
+.PHONY: install test test-integration test-all lint format check all clean
 
 install:
 	uv sync
@@ -6,6 +6,14 @@ install:
 test:
 	uv run pytest
 
+test-integration:
+	@echo "Running integration tests (requires Docker, optional: local data)..."
+	uv run pytest -m integration -v --timeout=600
+
+test-all:
+	@echo "Running all tests including integration..."
+	uv run pytest -v --timeout=600
+
 lint:
 	uv run ruff check .
 
@@ -16,3 +24,8 @@ check:
 	uv run mypy src/ tests/
 
 all: lint check test
+
+clean:
+	rm -rf .pytest_cache .mypy_cache .ruff_cache __pycache__ .coverage coverage.xml
+	find . -type d -name "__pycache__" -exec rm -rf {} + 2>/dev/null || true
+	find . -type f -name "*.pyc" -delete 2>/dev/null || true