Drop compromised eMudhra roots from outbound TLS trust (#2)

Outbound TLS in this image still trusted the compromised eMudhra roots (`emSign ECC Root CA - G3` and `Comodo AAA Services`).

- Image install now upgrades `ca-certificates` and regenerates the trust bundle.
- `certifi` is locked at 2026.10.23, which drops those roots for `requests` and `httpx`.

Merge this, then redeploy beta and prod.

Reviewed-on: #2

Dockerfile

@@ -9,7 +9,8 @@ ENV PYTHONDONTWRITEBYTECODE=1 \
 WORKDIR /app
 
 RUN apt-get update \
-    && apt-get install -y --no-install-recommends libpq5 \
+    && apt-get install -y --no-install-recommends ca-certificates libpq5 \
+    && update-ca-certificates \
     && rm -rf /var/lib/apt/lists/*
 
 COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv

uv.lock

@@ -13,11 +13,11 @@ wheels = [
 
 [[package]]
 name = "certifi"
-version = "2026.7.22"
+version = "2026.10.23"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/a3/c2/24167ea9858356b47a87a50d39908bfdb72ceeefe0041586e704e5376b3a/certifi-2026.7.22.tar.gz", hash = "sha256:741e2c3b351ddf169a738da9f2c048608ff7f2c5cc02f1ebc6b118bb090d5d55", size = 138112, upload-time = "2026-07-22T03:35:12.644Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/fd/11/b524cbd9bbdaca58608e4cf4053fd463417549e1959fa8d3aa18319f9555/certifi-2026.10.23.tar.gz", hash = "sha256:a9895e6e2758b371e0545e321a3a8fd1fcfd9829ada8824a936dfb16aaaf36cd", size = 136225, upload-time = "2026-10-23T11:36:16.478Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/0b/a7/71ac2cff56fec219ed242bb11b8efb69fcc4bec75db06fb7bfe35de520e6/certifi-2026.7.22-py3-none-any.whl", hash = "sha256:62f22742b58a1a33014a2b6b706588a8d7e2a88ae7bd1a6ebe8c992928483775", size = 136983, upload-time = "2026-07-22T03:35:11.276Z" },
+    { url = "https://files.pythonhosted.org/packages/32/d1/a3652fe2c19134d0d15922177821d863cbd7e842d53a21bbe7e8e3a1b5ac/certifi-2026.10.23-py3-none-any.whl", hash = "sha256:e9b54de76e530bb6cf0ccd036787103acb58fd42ba930ea8bf948ddbaa2f61d1", size = 135082, upload-time = "2026-10-23T11:36:14.763Z" },
 ]
 
 [[package]]