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

docker-compose.yml

@@ -53,11 +53,16 @@ services:
       ESL_PORT: "8021"
       ESL_PASSWORD: ${ESL_PASSWORD}
       SOFIA_EXTERNAL_GATEWAYS_DIR: /gateways
+      CALLCENTER_QUEUES_DIR: /callcenter-queues
     volumes:
       # Compartilhado com o FreeSWITCH (agente.md secao 41-42): fs-config
       # escreve os XML de gateway aqui, o profile "external" ja inclui
       # sip_profiles/external/*.xml automaticamente (config vanilla).
       - freeswitch_external_gateways:/gateways
+      # Compartilhado com o FreeSWITCH (agente.md secao 50-51): fs-config
+      # escreve um XML de fila por arquivo aqui, incluido via
+      # X-PRE-PROCESS no nosso callcenter.conf.xml (mesmo padrao acima).
+      - freeswitch_callcenter_queues:/callcenter-queues
     # Sem porta publicada: so o FreeSWITCH (mesma rede do compose) chama isto.
     healthcheck:
       test: ["CMD", "node", "-e", "fetch('http://localhost:8080/health').then(r => process.exit(r.ok ? 0 : 1)).catch(() => process.exit(1))"]
@@ -81,6 +86,7 @@ services:
       FS_CONFIG_PASSWORD: ${FS_CONFIG_PASSWORD}
     volumes:
       - freeswitch_external_gateways:/etc/freeswitch/sip_profiles/external
+      - freeswitch_callcenter_queues:/etc/freeswitch/autoload_configs/callcenter_queues.conf.d
     # Nenhuma porta publicada no host: SIP/RTP ainda não têm troncos reais
     # configurados, e o Event Socket (8021) só deve ser alcançável por outros
     # containers na rede interna do compose (agente.md secao 22).
@@ -119,3 +125,4 @@ volumes:
   postgres_data:
   redis_data:
   freeswitch_external_gateways:
+  freeswitch_callcenter_queues: