fix: add optional test deps to CI for full test coverage

CI now installs observability, websocket, and grpc extras so
prometheus, websocket, and gRPC transport tests can run.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: mosiddi

.github/workflows/ci.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install -e ".[dev]"
+          pip install -e ".[dev,observability,websocket,grpc]"
       
       - name: Run tests with coverage
         run: |