fix(ci): make chmod step more robust in test workflow

Make the chmod step for lql binary conditional to prevent CI failures
when node_modules/.bin/lql doesn't exist. pnpm workspace linking may
not always create the binary symlink in node_modules/.bin, but pnpm exec
still works correctly for workspace packages

Author: sdqede

.github/workflows/run-tests.yaml

@@ -64,7 +64,10 @@ jobs:
         run: pnpm run build
 
       - name: fix lql permissions
-        run: chmod +x node_modules/.bin/lql
+        run: |
+          if [ -f node_modules/.bin/lql ]; then
+            chmod +x node_modules/.bin/lql
+          fi
 
       - name: seed app_user
         run: |