upadte GHA config to assign dbt run to PR number

.github/workflows/slim_CI.yml

@@ -5,21 +5,20 @@ on:
   push:
     branches-ignore: [ "main", "master"]
 
-env:
-  TARGET_SCHEMA: dev
 
 jobs:
   validate_dbt_models:
     runs-on: ubuntu-latest
     permissions:
       contents: read
+      pull-requests: write
     steps:
       - uses: actions/checkout@v3
 
       - uses: ./.github/actions/setup-env
         with: 
           PROD_ENV: ${{ secrets.PROD_ENV }}           
-      
+
 
       - name: Cache Python packages
         uses: actions/cache@v3
@@ -68,8 +67,25 @@ jobs:
         run: npm install -g "@lightdash/cli@${{ steps.version.outputs.value }}" || npm install -g @lightdash/cli@latest
 
 
+      - uses: 8BitJonny/[email protected]
+        id: PR
+
+      - run: echo "PR=${prNumber}" >> $GITHUB_ENV
+        if: steps.PR.outputs.pr_found == 'true'
+        env:
+          prNumber: ${{ steps.PR.outputs.number }}
+
+      - name: dbt build models
+        run: dbt build --target ci --vars "$PR_schema"
+        env:
+          PR_schema: '"schema_name": "ci_PR_$PR"'
+
+
+
       - name: validate dbt models
-        run: dbt build
+        run: dbt build --target ci --vars "$PR_schema"
+        env:
+          PR_schema: '"schema_name": "ci_PR_$PR"'
 
 
       - name: validate LD