Replace IW4MAdmin with direct RCON for player counts

IW4M kept hitting a network wall (container -> host LAN IP -> IW4M
loopback bind) that we couldn't cleanly punch through, and the two-minute
!rt token added enough operational friction that the pause-all-deployments
gate never got a fair test. RCON gives us the same fact — how many
players are on a server right now — direct from each game server over
UDP, with no session, no token, no proxy.

- Add integrations/rcon.ts: dgram UDP client. rconGetPlayerCount() and
  rconGetStatus() parse both `status` (print + scoreboard) and
  `statusResponse` (info line + rows) dialects. Timeout via
  RCON_TIMEOUT_MS.
- Add komodoResolveGamePort() + extractUdpPort(). Reads Komodo's read
  API for a server, walks both docker-compose-style port objects and
  docker-run-style "host:container/udp" strings, caches into
  servers.game_port on first success.
- Replace pipelineReady() guard in sweep with a simple
  integrations-configured check. Same held/failed/manual outcomes,
  but keyed on RCON+Komodo instead of IW4M+auth-state.
- Worker's status refresh fans out per-server over RCON at concurrency=4
  so a 15-server fleet doesn't spike UDP.
- Schema: drop iw4m_match/iw4m_value, add game_port + rcon_host.
- Delete every auth artifact: TokenModal, auth store, auth-state module,
  /api/auth/token, /api/events/auth, iw4m.test.ts. Layout no longer
  mounts the modal, pipeline store no longer tracks a frozen state.
- README + .env.example + docker-compose.yml + komodo/stack.toml swap
  IW4M_* env for RCON_PASSWORD / RCON_HOST / RCON_TIMEOUT_MS. Same
  host.docker.internal:host-gateway extra_hosts entry, repurposed
  for RCON reach.
- Tests: add rcon.test.ts and komodo.test.ts, update sweep.test.ts to
  drop the auth-freeze case. 23/23 passing.

src/lib/ui/components/PipelineTimeline.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-    import { deployments, frozen, frozenReason } from '$ui/stores/pipeline.js';
+    import { deployments } from '$ui/stores/pipeline.js';
 
     // Newest first, up to 8 rows on the dashboard.
     let rows = $derived(
@@ -32,9 +32,6 @@
 <div class="wrapper">
     <header>
         <h3>Pipeline</h3>
-        {#if $frozen}
-            <span class="frozen">frozen — {$frozenReason ?? 'no reason'}</span>
-        {/if}
     </header>
     {#if rows.length === 0}
         <p class="empty">no active deployments</p>
@@ -77,7 +74,6 @@
         margin-bottom: 8px;
     }
     h3 { margin: 0; font-size: 14px; text-transform: uppercase; letter-spacing: 0.5px; color: #aaa; }
-    .frozen { color: #ff6060; font-size: 12px; }
     .empty { color: #666; font-size: 13px; margin: 0; }
     .rows { display: grid; gap: 8px; }
     .row {