Fix Dockerfile: Remove broken apt-get install, rely on CloudNativePG base image extensions

Dockerfile

@@ -3,19 +3,10 @@
 
 # UmbraDatastore - PostgreSQL with UmbraTrans schema
 # Based on CloudNativePG PostgreSQL 16.4
+# Note: CloudNativePG base image already includes pgcrypto, uuid-ossp, citext extensions
 
 FROM ghcr.io/cloudnative-pg/postgresql:16.4
 
-# Install additional extensions if needed
-USER root
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    postgresql-16-pgcrypto \
-    postgresql-16-uuid-ossp \
-    && rm -rf /var/lib/apt/lists/*
-
-# Switch back to postgres user
-USER postgres
-
 # Copy migration scripts to be run on initialization
 # These will be executed by CNPG's postInitApplicationSQL or via initdb
 COPY migrations/ /docker-entrypoint-initdb.d/