Tools organized by domain

Tool names now lead with their domain - players_summary, battles_query, war_current, elixir_feedback - so every client lists them grouped: Players, Battles, Clans, War, Cards, Live, and Elixir MCP itself. The service domain also grew four tools: watch a player, request clan recording, corpus-wide data insights, and the collector ladder. Reconnect to pick up the new names.