fix: use debian:trixie-slim runtime (match rust:latest glibc)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

warzone/deploy/docker/Dockerfile.server

@@ -18,7 +18,7 @@ RUN cargo install wasm-pack && \
 RUN cargo build --release --bin warzone-server
 
 # Runtime
-FROM debian:bookworm-slim
+FROM debian:trixie-slim
 RUN apt-get update && apt-get install -y ca-certificates && rm -rf /var/lib/apt/lists/*
 
 COPY --from=builder /build/warzone/target/release/warzone-server /usr/local/bin/