Implement robust logging with flexi_logger and update CI to verify logs

.gitea/workflows/smoke-tests.yml

@@ -170,3 +170,23 @@ jobs:
           grep -q '"shop"' rpc_resp.json
           rm rpc_resp.json
           ./target/debug/mudtool -d "$TEST_DB" players delete rpctest
+
+      - name: Verify logging
+        run: |
+          if [ ! -d "logs" ]; then
+            echo "Error: logs directory not found"
+            exit 1
+          fi
+          if ! ls logs/mudserver_*.log >/dev/null 2>&1; then
+            echo "Error: no log files found"
+            exit 1
+          fi
+          LOG_FILE=$(ls -t logs/mudserver_*.log | head -n 1)
+          echo "Checking log file: $LOG_FILE"
+          grep -q "World '.*': .* rooms" "$LOG_FILE"
+          grep -q "MUD server listening on" "$LOG_FILE"
+          grep -q "New character created: smoketest" "$LOG_FILE"
+          grep -q "Admin action: registration setting updated: '.*'" "$LOG_FILE"
+          grep -q "Combat: Player 'smoketest' (ID .*) killed NPC 'Shadowy Thief'" "$LOG_FILE"
+          grep -q "New character created: rpctest" "$LOG_FILE"
+          grep -q "New JSON-RPC connection from" "$LOG_FILE"