Checkout submodules recursively in workflows

Add 'submodules: recursive' to the actions/checkout step in build-pr.yml, build.yml, and publish-api.yml so CI jobs fetch repository submodules. This ensures submodules are available during builds and aligns checkout configuration across workflows (keeping fetch-depth: 0 where already set).

.github/workflows/build-pr.yml

@@ -11,6 +11,8 @@ jobs:
     steps:
       - name: Checkout Git Repository
         uses: actions/checkout@v7
+        with:
+          submodules: recursive
 
       - name: Set Up JDK
         uses: actions/setup-java@v5

.github/workflows/build.yml

@@ -30,6 +30,7 @@ jobs:
         uses: actions/checkout@v7
         with:
           fetch-depth: 0
+          submodules: recursive
 
       - name: Get Branch Build Number
         run: |

.github/workflows/publish-api.yml

@@ -15,6 +15,7 @@ jobs:
         uses: actions/checkout@v7
         with:
           fetch-depth: 0
+          submodules: recursive
 
       - name: Get Branch Build Number
         run: |