fix(docker): add libsqlite3-0 to runtime image to fix SQLite CANTOPEN error

The server binary dynamically links against libsqlite3.so.0, which is not
present in debian:bookworm-slim by default, causing SQLite error code 14
at startup when connecting to the database.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

solitaire_server/Dockerfile

@@ -52,6 +52,7 @@ FROM debian:bookworm-slim
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
     ca-certificates \
+    libsqlite3-0 \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app