checkpoint: pipeline + 27k/h baseline before sitemap discovery

Dockerfile

@@ -13,6 +13,10 @@ RUN pip install --no-cache-dir uv \
     && pip install --no-cache-dir -r /tmp/requirements.txt \
     && pip install --no-cache-dir playwright-stealth
 
+# Speed-up libs: orjson (fast JSON parse), brotli (HTTP br decompress).
+# Pinned outside uv.lock to avoid lock-regen churn.
+RUN pip install --no-cache-dir "orjson>=3.10.0" "brotli>=1.1.0"
+
 # Install both Chromium and Firefox. Chromium is the default engine in Docker
 # because it works more reliably with the current IAAI listing page.
 RUN python -m playwright install chromium firefox