Add audit logs, file-backed service logs, and localized timestamp display

deploy/README.md

@@ -76,6 +76,7 @@ Logs:
 
 ```bash
 journalctl -u chat-grid.service -f
+tail -f /home/bestmidi/chgrid/server/runtime/server.log
 ```
 
 If you previously used `chgrid-signaling.service`, migrate once:

deploy/scripts/install_service.sh

@@ -12,6 +12,9 @@ if [[ ! -f "$SRC_UNIT" ]]; then
 fi
 
 sudo cp "$SRC_UNIT" "$DST_UNIT"
+sudo install -d -m 0755 -o bestmidi -g bestmidi "$REPO_ROOT/server/runtime"
+sudo touch "$REPO_ROOT/server/runtime/server.log"
+sudo chown bestmidi:bestmidi "$REPO_ROOT/server/runtime/server.log"
 sudo systemctl daemon-reload
 sudo systemctl enable --now "$UNIT_NAME"
 sudo systemctl restart "$UNIT_NAME"

deploy/systemd/chat-grid.service

@@ -8,7 +8,10 @@ User=bestmidi
 Group=bestmidi
 WorkingDirectory=/home/bestmidi/chgrid/server
 Environment=PATH=/home/bestmidi/chgrid/server/.venv/bin:/usr/bin:/bin
+ExecStartPre=/usr/bin/mkdir -p /home/bestmidi/chgrid/server/runtime
 ExecStart=/home/bestmidi/chgrid/server/.venv/bin/python main.py --config /home/bestmidi/chgrid/server/config.toml
+StandardOutput=append:/home/bestmidi/chgrid/server/runtime/server.log
+StandardError=append:/home/bestmidi/chgrid/server/runtime/server.log
 Restart=always
 RestartSec=3