ci: install birdxplorer_common in ETL test job

The ETL test job only installed etl[dev] dependencies, but
birdxplorer_common is a prod-only dependency. Tests that import
extract_ecs.py (which uses birdxplorer_common.storage) failed with
ModuleNotFoundError in CI. This matches what tox.ini already does
with `-e ../common`.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ayuki-joto

.github/workflows/test.yml

@@ -69,7 +69,7 @@ jobs:
           cache: pip
           cache-dependency-path: etl/pyproject.toml
       - name: dependency install
-        run: pip install -e "./etl[dev]"
+        run: pip install -e "./common" -e "./etl[dev]"
       - name: copy env
         run: cp .env.example etl/.env
       - name: test