fix: use GitHub App token in integration-tests workflow (#100)

Author: AbhiPrasad

.github/workflows/integration-tests.yaml

@@ -14,19 +14,32 @@ jobs:
       pull-requests: write
 
     steps:
+      - name: Generate GitHub App token
+        id: app-token
+        uses: actions/create-github-app-token@f8d387b68d61c58ab83c6c016672934102569859 # v3.0.0
+        with:
+          app-id: ${{ secrets.BRAINTRUST_BOT_APP_ID }}
+          private-key: ${{ secrets.BRAINTRUST_BOT_PRIVATE_KEY }}
+          owner: braintrustdata
+          repositories: |
+            braintrust
+            braintrust-sdk-python
+          permission-contents: write
+          permission-pull-requests: write
+
       - name: Checkout parent repository
         uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
         with:
           repository: braintrustdata/braintrust
           path: braintrust
-          token: ${{ secrets.CROSS_REPO_TOKEN }}
+          token: ${{ steps.app-token.outputs.token }}
           fetch-depth: 0
 
       - name: Configure Git in parent repository
         run: |
           cd braintrust
-          git config user.name "GitHub Actions Bot"
-          git config user.email "actions@github.com"
+          git config user.name "${{ steps.app-token.outputs.app-slug }}[bot]"
+          git config user.email "${{ steps.app-token.outputs.app-slug }}[bot]@users.noreply.github.com"
 
       - name: Initialize and update SDK submodule
         run: |
@@ -41,7 +54,7 @@ jobs:
       - name: Create integration test PR
         run: ./braintrust/sdk/scripts/create-integration-test-pr.sh
         env:
-          GH_TOKEN: ${{ secrets.CROSS_REPO_TOKEN }}
+          GH_TOKEN: ${{ steps.app-token.outputs.token }}
           BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
           COMMIT_HASH: ${{ github.event.pull_request.head.sha }}
           PARENT_REPO_PATH: braintrust