fix: re-enable tests and fix legacy test interface (#208)

* fix: re-enable tests and fix legacy test interface

* fix: skip llamacpp based on installed status

* fix: minor fix

.github/workflows/unit-test.yaml

@@ -11,9 +11,9 @@ env:
 
 jobs:
   unit-test:
-    if: false # temporary disable this job due to legacy interface
+    # if: false # temporary disable this job due to legacy interface
     #TODO: enable this job after the new interface is ready
-    # if: ${{ !cancelled() }}
+    if: ${{ !cancelled() }}
     runs-on: ${{ matrix.os }}
     timeout-minutes: 20
     defaults: