fix: update workflow to use pre/v2.2 and fix docker-compose deps

- Publishing workflow now checks out datajoint-python at pre/v2.2
  instead of master (until merged)
- EXECUTE_PG mode sets DJ_HOST=postgres (correct Docker service name)
- Added zarr, matplotlib, faker to pip install for notebook execution

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

Author: dimitri-yatsenko

.github/workflows/development.yml

@@ -17,7 +17,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           repository: datajoint/datajoint-python
-          ref: master
+          ref: pre/v2.2
           path: datajoint-python
       - name: Compile docs static artifacts
         run: |

docker-compose.yaml

@@ -93,13 +93,14 @@ services:
         elif echo "$${MODE}" | grep -i execute_pg &>/dev/null; then
             # EXECUTE_PG mode: execute notebooks against PostgreSQL
             pip install -e "/datajoint-python[postgres]"
-            pip install scikit-image pooch nbconvert
+            pip install scikit-image pooch nbconvert matplotlib faker zarr
             echo "Executing notebooks against PostgreSQL..."
+            export DJ_HOST=postgres
             python scripts/execute_notebooks.py --backend postgresql
         elif echo "$${MODE}" | grep -i execute &>/dev/null; then
             # EXECUTE mode: execute notebooks against MySQL (default)
             pip install -e /datajoint-python
-            pip install scikit-image pooch nbconvert
+            pip install scikit-image pooch nbconvert matplotlib faker zarr
             echo "Executing notebooks against MySQL..."
             python scripts/execute_notebooks.py --backend mysql
         else