fix: workflow subdir

.github/workflows/test.yaml

@@ -1,16 +1,23 @@
-name: Rust CI
+name: Test Agent
 
 on:
   push:
     branches:
       - main
+    paths:
+      - "agent/**"
   pull_request:
     branches:
       - main
+    paths:
+      - "agent/**"
 
 jobs:
   test:
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: agent
 
     steps:
       - uses: actions/checkout@v4