Get Demo Summary

Get a high-level summary of the demo: map, gametype, hostname, frame_count, duration_ms (authoritative server-time duration — do NOT compute from frame_count), player_count, total_kills, total_chat_messages, scoreboard (per-player kills/deaths/score). For team games: red_team_score, blue_team_score (from CS_SCORES1/CS_SCORES2 configstrings — the authoritative server score: captures for CTF, rounds for CA, frags for TDM), score_type ('captures'/'rounds'/'frags' — explains what the team score represents).