chore: update paperclip user UID to 1001 in Dockerfile

Dockerfile

@@ -81,7 +81,7 @@ RUN chmod +x /app/start.sh /app/setup-uptimerobot.sh
 # Claude Code refuses --dangerously-skip-permissions when running as root
 # Note: /app files stay root-owned (644/755 defaults = readable by all).
 # /paperclip runtime dir is chowned to paperclip in start.sh after restore.
-RUN useradd -m -u 1000 -s /bin/bash paperclip && \
+RUN useradd -m -u 1001 -s /bin/bash paperclip && \
     mkdir -p /paperclip /var/lib/postgresql/data && \
     chown -R postgres:postgres /var/lib/postgresql/data && \
     chown paperclip:paperclip /paperclip