feat: implement Call Center queues (mod_callcenter)

- Investigated the real callcenter_config command surface via
  'help callcenter_config' on the running FreeSWITCH before writing any
  code: queues only have load/unload/reload (static XML + reload, no
  'queue add' exists), while agents and tiers are fully dynamic via ESL
  commands (agent add, tier add) -- no file involved. This shapes the next
  phase (Agents/Tiers) differently from this one.
- queues table (tenant-scoped, RLS): strategy, moh/announce, wait times,
  tier rules, discard/abandoned handling, skip-agents-with-external-calls,
  recording_enabled
- packages/telephony: buildQueueXml()
- infrastructure/freeswitch: our own callcenter.conf.xml override (empties
  the vanilla static agents/tiers -- those become fully dynamic in the next
  phase) that includes callcenter_queues.conf.d/*.xml via X-PRE-PROCESS,
  same pattern as the Sofia gateway directory
- apps/api/src/queues: CRUD (POST/GET/GET:id/DELETE) using the queues.view/
  .manage permissions already in the seed
- b2bcall-fs-config (queue-sync.ts): one XML file per queue on a shared
  volume, synced via Redis pub/sub (b2bcall:queues:sync) on create/delete
  and once at boot -- same shape as trunk-sync.ts
- confirmed manually against the real FreeSWITCH, before coding the sync
  logic: 'queue load <name>' fails ('Invalid Queue not found!') for a file
  added after boot -- needs 'reloadxml' first to repopulate the in-memory
  XML tree from disk; after that, 'queue reload <name>' alone handles both
  create and update, no need to distinguish load vs reload
- verified end-to-end: created a queue (ROUND_ROBIN, maxWaitTime=120,
  discardAbandonedAfter=90), 'callcenter_config queue list' showed the
  correct values on the FreeSWITCH side; deleted it, list went back empty

docs/QUEUES.md

apps/freeswitch-config/src/main.ts

@@ -7,10 +7,12 @@ import { decryptSecret } from "@b2bcall/shared";
 import { buildDirectoryUserXml, NOT_FOUND_XML } from "@b2bcall/telephony";
 import { createLogger } from "@b2bcall/shared";
 import { syncTrunks } from "./trunk-sync";
+import { syncQueues } from "./queue-sync";
 
 const logger = createLogger("b2bcall-fs-config");
 
 const TRUNKS_SYNC_CHANNEL = "b2bcall:trunks:sync";
+const QUEUES_SYNC_CHANNEL = "b2bcall:queues:sync";
 
 function requireEnv(name: string): string {
   const value = process.env[name];
@@ -172,12 +174,17 @@ async function main() {
   // criados enquanto este servico estava fora do ar.
   const subscriber = new Redis(process.env.REDIS_URL!);
   subscriber.on("error", (err) => logger.error("erro na conexao Redis (subscriber)", { error: String(err) }));
-  await subscriber.subscribe(TRUNKS_SYNC_CHANNEL);
-  subscriber.on("message", (_channel, _msg) => {
-    syncTrunks().catch((err) => logger.error("falha ao sincronizar trunks", { error: String(err) }));
+  await subscriber.subscribe(TRUNKS_SYNC_CHANNEL, QUEUES_SYNC_CHANNEL);
+  subscriber.on("message", (channel, _msg) => {
+    if (channel === TRUNKS_SYNC_CHANNEL) {
+      syncTrunks().catch((err) => logger.error("falha ao sincronizar trunks", { error: String(err) }));
+    } else if (channel === QUEUES_SYNC_CHANNEL) {
+      syncQueues().catch((err) => logger.error("falha ao sincronizar filas", { error: String(err) }));
+    }
   });
 
   syncTrunks().catch((err) => logger.error("falha na sincronizacao inicial de trunks", { error: String(err) }));
+  syncQueues().catch((err) => logger.error("falha na sincronizacao inicial de filas", { error: String(err) }));
 }
 
 main().catch((err) => {