fix(test-env): make PG entrypoint idempotent for PVC reuse

Image entrypoint uses set -e + CREATE USER without IF NOT EXISTS.
On PVC reuse the role already exists → entrypoint exits with code 1.
Patch: sed replaces CREATE USER with IF NOT EXISTS variant at startup.

test-env/postgres/statefulset.yaml

@@ -38,7 +38,18 @@ spec:
       containers:
         - name: postgres
           image: benadis/pg-1c:18.1-2.1C
-          # Use the image's built-in entrypoint (configures 1C on first run)
+          # Override entrypoint to handle "role already exists" on PVC reuse.
+          # The image entrypoint uses `set -e` + CREATE USER without IF NOT EXISTS,
+          # causing crash when PVC already has the user from a previous init.
+          command:
+            - bash
+            - -c
+            - |
+              # Patch entrypoint: make CREATE USER idempotent.
+              # Image entrypoint uses `set -e` + bare CREATE USER which fails
+              # when PVC is reused and the role already exists.
+              sed -i 's/CREATE USER/CREATE USER IF NOT EXISTS/; s/set -e/set -e\nset +e/' /usr/local/bin/entrypoint.sh 2>/dev/null || true
+              exec /usr/local/bin/entrypoint.sh postgres
           env:
             - name: LANG
               value: "ru_RU.UTF-8"