fix: validate version ci pipeline

Author: cosminacho

.github/workflows/validate-version.yml

@@ -0,0 +1,31 @@
+name: Validate Version
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  validate-uipath-langchain:
+    name: uipath-langchain
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+
+      - name: Get changed files
+        run: |
+          git diff origin/main...HEAD --name-only > changes.txt
+          echo "Changed files:"
+          cat changes.txt
+
+      - name: Validate version update
+        run: |
+          src_changes=$(grep -E '^src/uipath_langchain/' changes.txt || true)
+          version_change=$(grep -E '^pyproject.toml' changes.txt || true)
+          if [ -n "$src_changes" ] && [ -z "$version_change" ]; then
+            echo "::error::uipath-langchain: package changes detected in src/uipath_langchain/ but no version update in pyproject.toml"
+            exit 1
+          fi
+          echo "✓ Version is consistent with changes."