chore(repo): add pgvector to our local postgresql instance

docker/Dockerfile.postgres

@@ -1,5 +1,23 @@
 FROM postgres:14
 
+# Install build dependencies for pgvector
 RUN apt-get update \
-    && apt-get install -y postgresql-14-partman \
+    && apt-get install -y --no-install-recommends \
+       postgresql-14-partman \
+       postgresql-server-dev-14 \
+       build-essential \
+       git \
+       ca-certificates \
     && rm -rf /var/lib/apt/lists/*
+
+# Install pgvector
+RUN cd /tmp \
+    && git clone --branch v0.5.1 https://github.com/pgvector/pgvector.git \
+    && cd pgvector \
+    && make \
+    && make install \
+    && cd .. \
+    && rm -rf pgvector
+
+# Optional: Cleanup build dependencies to keep image small (if you want)
+# RUN apt-get remove -y build-essential git postgresql-server-dev-14 && apt-get autoremove -y