fix(turbo): add build dependency to test:coverage task

Ensures workspace packages are built before running coverage tests,
fixing @packages/ddd-kit resolution errors in CI.

Author: axelhamil

turbo.json

@@ -36,6 +36,7 @@
       "cache": false
     },
     "test:coverage": {
+      "dependsOn": ["^build"],
       "outputs": ["coverage/**"],
       "cache": false
     },