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/stores/auth.ts

@@ -1,51 +0,0 @@
-import { writable, derived } from 'svelte/store';
-import { browser } from '$app/environment';
-
-export type AuthState =
-    | { kind: 'ready'; token: string; expiresAt: number }
-    | { kind: 'stale'; reason: 'expired' | 'rejected' | 'unreachable' }
-    | { kind: 'missing' };
-
-interface AuthPayload {
-    type: 'auth-state';
-    state: AuthState;
-    msRemaining?: number;
-}
-
-export const authState = writable<AuthState>({ kind: 'missing' });
-export const msRemaining = writable<number>(0);
-
-export const isReady = derived(authState, ($s) => $s.kind === 'ready');
-export const shouldBlock = derived(authState, ($s) => $s.kind !== 'ready');
-
-let source: EventSource | null = null;
-
-export function startAuthStream(): void {
-    if (!browser || source) return;
-    source = new EventSource('/api/events/auth');
-    source.addEventListener('auth-state', (evt) => {
-        try {
-            const payload = JSON.parse((evt as MessageEvent).data) as AuthPayload;
-            authState.set(payload.state);
-            if (payload.msRemaining !== undefined) msRemaining.set(payload.msRemaining);
-        } catch {
-            /* ignore malformed */
-        }
-    });
-    source.addEventListener('error', () => {
-        // Browser will auto-reconnect. If the stream stays down long enough,
-        // the token will expire on the server anyway and the next reconnect
-        // will surface the transition.
-    });
-}
-
-export async function submitToken(token: string): Promise<{ ok: true } | { ok: false; error: string }> {
-    const res = await fetch('/api/auth/token', {
-        method: 'POST',
-        headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify({ token })
-    });
-    const body = (await res.json()) as { ok: boolean; error?: string };
-    if (!res.ok || !body.ok) return { ok: false, error: body.error ?? `HTTP ${res.status}` };
-    return { ok: true };
-}

src/lib/ui/stores/pipeline.ts

@@ -11,8 +11,6 @@ export interface PipelineDeployment {
 }
 
 export const deployments = writable<Map<string, PipelineDeployment>>(new Map());
-export const frozen = writable<boolean>(false);
-export const frozenReason = writable<string | null>(null);
 
 let source: EventSource | null = null;
 
@@ -51,10 +49,4 @@ export function startPipelineStream(): void {
             d.servers.set(data.server, { state: data.state, players: data.players, error: data.error });
         });
     });
-
-    source.addEventListener('sweep-tick', (evt) => {
-        const data = JSON.parse((evt as MessageEvent).data) as { frozen: boolean; reason?: string };
-        frozen.set(data.frozen);
-        frozenReason.set(data.reason ?? null);
-    });
 }