feat: activate mod_xml_curl with b2bcall-fs-config (agente.md secao 26)

- apps/freeswitch-config (b2bcall-fs-config): Fastify service implementing
  the mod_xml_curl HTTP protocol (form-encoded POST -> XML response),
  containerized, no host port published
- reactivated mod_xml_curl in FreeSWITCH, binding restricted to
  directory|dialplan only (configuration was removed after testing showed
  it firing several unnecessary HTTP round-trips at boot for module
  configs we don't need dynamic — matches agente.md's own 'don't put every
  critical config through XML Curl' guidance)
- no extensions/dialplan tables exist yet (next phases), so the service
  always answers 'not found' for now — this phase only proves the wire
  protocol works without breaking the static vanilla config fallback
- verified end-to-end: user/8888 (nowhere) -> SUBSCRIBER_ABSENT via
  fs-config; user/1000 (static vanilla extension) -> USER_NOT_REGISTERED,
  proving FreeSWITCH correctly falls through to static XML when xml_curl
  says not found
- docs/XML_CURL.md, including the not-yet-authenticated endpoint note (fine
  while it only returns not-found; needs gateway-credentials before serving
  real directory/dialplan data)

apps/freeswitch-config/Dockerfile

@@ -0,0 +1,17 @@
+# syntax=docker/dockerfile:1.7
+FROM node:22-slim
+
+RUN corepack enable && corepack prepare pnpm@11.24.0 --activate
+
+WORKDIR /repo
+
+COPY pnpm-workspace.yaml package.json pnpm-lock.yaml tsconfig.base.json ./
+COPY packages/types packages/types
+COPY packages/shared packages/shared
+COPY apps/freeswitch-config apps/freeswitch-config
+
+RUN pnpm install --frozen-lockfile --filter @b2bcall/freeswitch-config...
+
+WORKDIR /repo/apps/freeswitch-config
+
+CMD ["pnpm", "exec", "tsx", "src/main.ts"]

apps/freeswitch-config/package.json

@@ -0,0 +1,21 @@
+{
+  "name": "@b2bcall/freeswitch-config",
+  "version": "0.0.1",
+  "private": true,
+  "scripts": {
+    "dev": "tsx watch src/main.ts",
+    "build": "tsc -p tsconfig.json",
+    "start": "node dist/main.js",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "@b2bcall/shared": "workspace:*",
+    "@fastify/formbody": "^8.0.1",
+    "fastify": "5.12.1"
+  },
+  "devDependencies": {
+    "@types/node": "^22.0.0",
+    "tsx": "^4.23.12",
+    "typescript": "^5.7.0"
+  }
+}

apps/freeswitch-config/src/main.ts

@@ -0,0 +1,58 @@
+import Fastify from "fastify";
+import formbody from "@fastify/formbody";
+import { createLogger } from "@b2bcall/shared";
+
+const logger = createLogger("b2bcall-fs-config");
+
+/**
+ * Resposta padrão do protocolo XML Curl pra "não achei nada aqui" — o
+ * FreeSWITCH cai de volta pras outras fontes XML registradas (a config
+ * estática vanilla continua funcionando normalmente).
+ */
+const NOT_FOUND_XML = `<?xml version="1.0" encoding="UTF-8"?>
+<document type="freeswitch/xml">
+  <section name="result">
+    <result status="not found"/>
+  </section>
+</document>`;
+
+interface XmlCurlBody {
+  section?: string;
+  tag_name?: string;
+  key_name?: string;
+  key_value?: string;
+  purpose?: string;
+  user?: string;
+  domain?: string;
+  [key: string]: unknown;
+}
+
+async function main() {
+  const app = Fastify({ logger: false });
+  await app.register(formbody);
+
+  app.post<{ Body: XmlCurlBody }>("/", async (request, reply) => {
+    const { section, purpose, user, domain } = request.body ?? {};
+
+    logger.info("requisicao xml_curl recebida", { section, purpose, user, domain });
+
+    // Nenhuma tabela de extensions/dialplan existe ainda (fases Extensions/
+    // Trunks/Dialplan, agente.md secao 232). Por enquanto respondemos
+    // sempre "not found" — prova o encanamento (FreeSWITCH -> mod_xml_curl
+    // -> este servico -> XML valido) sem afetar a config estatica vanilla,
+    // que continua sendo consultada como fallback.
+    reply.header("Content-Type", "text/xml");
+    return NOT_FOUND_XML;
+  });
+
+  app.get("/health", async () => ({ status: "ok" }));
+
+  const port = Number(process.env.PORT ?? 8080);
+  await app.listen({ port, host: "0.0.0.0" });
+  logger.info(`b2bcall-fs-config ouvindo na porta ${port}`);
+}
+
+main().catch((err) => {
+  logger.error("falha fatal ao iniciar b2bcall-fs-config", { error: String(err) });
+  process.exit(1);
+});

apps/freeswitch-config/tsconfig.json

@@ -0,0 +1,9 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "rootDir": "src",
+    "types": ["node"]
+  },
+  "include": ["src"]
+}