Fix workflow: Add krb5 system dependency

The workflow was failing during poetry install due to missing krb5
system libraries needed for kerberos dependencies.

Signed-off-by: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: msrathore-db

.github/workflows/test-telemetry-only.yml

@@ -29,6 +29,11 @@ jobs:
         with:
           python-version: "3.10"
 
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libkrb5-dev
+
       - name: Install Poetry
         uses: snok/install-poetry@v1
         with: