Update module name to github.com/fraktal/mev-beta and fix channel closing issues in pipeline stages

Makefile

@@ -29,6 +29,12 @@ test:
 	@echo "Running tests..."
 	@go test -v ./...
 
+# Run tests for a specific package
+.PHONY: test-pkg
+test-pkg:
+	@echo "Running tests for package..."
+	@go test -v ./$(PKG)/...
+
 # Run tests with coverage
 .PHONY: test-coverage
 test-coverage:
@@ -37,6 +43,24 @@ test-coverage:
 	@go tool cover -html=coverage.out -o coverage.html
 	@echo "Coverage report generated: coverage.html"
 
+# Run unit tests
+.PHONY: test-unit
+test-unit:
+	@echo "Running unit tests..."
+	@go test -v ./test/unit/...
+
+# Run integration tests
+.PHONY: test-integration
+test-integration:
+	@echo "Running integration tests..."
+	@go test -v ./test/integration/...
+
+# Run end-to-end tests
+.PHONY: test-e2e
+test-e2e:
+	@echo "Running end-to-end tests..."
+	@go test -v ./test/e2e/...
+
 # Clean build artifacts
 .PHONY: clean
 clean:
@@ -79,6 +103,14 @@ update:
 	@go mod tidy
 	@echo "Dependencies updated!"
 
+# Install test dependencies
+.PHONY: test-deps
+test-deps:
+	@echo "Installing test dependencies..."
+	@go get github.com/stretchr/testify/assert
+	@go mod tidy
+	@echo "Test dependencies installed!"
+
 # Help
 .PHONY: help
 help:
@@ -87,9 +119,14 @@ help:
 	@echo "  build           - Build the application"
 	@echo "  run             - Build and run the application"
 	@echo "  test            - Run tests"
+	@echo "  test-pkg        - Run tests for a specific package (use PKG=package_name)"
 	@echo "  test-coverage   - Run tests with coverage report"
+	@echo "  test-unit       - Run unit tests"
+	@echo "  test-integration - Run integration tests"
+	@echo "  test-e2e        - Run end-to-end tests"
 	@echo "  clean           - Clean build artifacts"
 	@echo "  deps            - Install dependencies"
+	@echo "  test-deps       - Install test dependencies"
 	@echo "  fmt             - Format code"
 	@echo "  vet             - Vet code"
 	@echo "  lint            - Lint code (requires golangci-lint)"