feat(secretaria): tools de agenda operam na agenda real do satélite via ponte

listar_horarios/agendar_horario chamam a ponte do scoreodonto (/api/nw/agenda
slots|book) quando configurada — slot_id sintético (dentista|start|end), telefone
derivado do JID do contato — com fallback ao calendário interno preservado.
brain.ts injeta a config da agenda (agenda_url/secret/clinica_id) no toolCtx.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

newwhats.clube67.com/newwhats.local/plugins/secretaria/brain.ts

@@ -78,12 +78,20 @@ export class ProtocolEngine {
     const toolNames = opts?.tools ?? ALL_TOOL_NAMES
     const toolDefs  = resolveTools(toolNames)
 
+    const secCfg = (await this.config.get('secretaria')) as any
     const toolCtx: ToolContext = {
       db:             this.db,
       conversationId,
       extChatId:      conversation.ext_chat_id ?? undefined,
       tenantId:       opts?.tenantId,
       hooks:          opts?.hooks,
+      // Ponte de agenda do satélite (scoreodonto) — as tools de agenda operam
+      // na agenda real da clínica quando configurada.
+      agenda: {
+        url:       secCfg?.agenda_url,
+        secret:    secCfg?.agenda_secret,
+        clinicaId: secCfg?.clinica_id,
+      },
     }
 
     let response: string