Use database fleet registry and gate RCON polling on container readiness

src/lib/server/db/index.ts

@@ -12,6 +12,7 @@ let _db: Database.Database | null = null;
 // IF NOT EXISTS in schema.sql is a no-op on existing tables, so it can't
 // backfill columns; this can.
 const SERVERS_COLUMNS: Array<{ name: string; ddl: string }> = [
+    { name: 'container_state', ddl: 'ALTER TABLE servers ADD COLUMN container_state TEXT' },
     // Base columns that shipped in the very first schema stay here for parity
     // with fresh installs — no ALTER is issued if they're already present.
     { name: 'komodo_server', ddl: 'ALTER TABLE servers ADD COLUMN komodo_server TEXT' },

src/lib/server/db/schema.sql

@@ -11,6 +11,7 @@ CREATE TABLE IF NOT EXISTS servers (
     komodo_type      TEXT NOT NULL DEFAULT 'deployment',  -- deployment|stack|container
     komodo_name      TEXT NOT NULL,
     komodo_server    TEXT,
+    container_state TEXT,                                -- last observed Komodo runtime state
     game_port        INTEGER,                             -- UDP RCON port; lazy-filled from Komodo
     rcon_host        TEXT,                                -- optional per-server override of RCON_HOST
     game             TEXT,                                -- 't5' etc.; static per-server (no map rotation)