Run the E2E runner as the invoking user so its artifacts aren't root-owned

e2e-tests/compose.oauth.yml

@@ -3,7 +3,7 @@
 # it via the Kratos session and accepts. Runs against the real stack (Postgres + Kratos + Keto +
 # Hydra + bootstrap + web). The runner drives the flow over HTTP (fetch, manual cookies), so it
 # reaches the Ory services by their compose-network names.
-#   docker compose -f compose.yml -f e2e-tests/compose.oauth.yml run --build --rm e2e
+#   docker compose -f compose.yml -f e2e-tests/compose.oauth.yml run --user "$(id -u):$(id -g)" --build --rm e2e
 #   docker compose -f compose.yml -f e2e-tests/compose.oauth.yml down -v   # tear down after
 services:
   web: