chore: allow install e2e previous override

scripts/test-install-sh-e2e-docker.sh

@@ -19,6 +19,8 @@ echo "==> Run E2E installer test"
 docker run --rm -t \
   -e CLAWDBOT_INSTALL_URL="$INSTALL_URL" \
   -e CLAWDBOT_E2E_MODELS="$CLAWDBOT_E2E_MODELS" \
+  -e CLAWDBOT_INSTALL_E2E_PREVIOUS="${CLAWDBOT_INSTALL_E2E_PREVIOUS:-}" \
+  -e CLAWDBOT_INSTALL_E2E_SKIP_PREVIOUS="${CLAWDBOT_INSTALL_E2E_SKIP_PREVIOUS:-0}" \
   -e OPENAI_API_KEY="$OPENAI_API_KEY" \
   -e ANTHROPIC_API_KEY="$ANTHROPIC_API_KEY" \
   "$IMAGE_NAME"