Add psycopg2

Containerfile

@@ -2,14 +2,14 @@ FROM ghcr.io/astral-sh/uv:python3.13-alpine as builder
 ENV UV_COMPILE_BYTECODE=1 UV_LINK_MODE=copy UV_PYTHON_DOWNLOADS=0
 WORKDIR /app
 ADD . /app
-RUN apk add --no-cache cargo git && \
-    uv sync --frozen --no-install-project --no-dev
+RUN apk add --no-cache cargo git libpq libpq-dev && \
+    uv sync --frozen --no-install-project --no-dev --extra postgres
 RUN --mount=type=cache,target=/root/.cache/uv \
     uv sync --frozen --no-dev
 
 FROM python:3.13-alpine3.20
-# slixmpp requires libgcc
-RUN apk add --no-cache libgcc
+# slixmpp requires libgcc and libpq for Postgres support
+RUN apk add --no-cache libgcc libpq
 
 # Install the application
 COPY --from=builder /app /app