fix: refactor Makefile to fix checkmake maxbodylength violations (#95)

scripts/test-coverage.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+set -eu
+
+echo "Running tests with coverage..."
+go test -race -v -coverprofile=coverage.out -covermode=atomic ./...
+echo ""
+echo "Coverage summary:"
+go tool cover -func=coverage.out | grep total:
+echo ""
+echo "Full coverage report saved to: coverage.out"
+echo "To view HTML report, run: make coverage"