Add AID export: OpenAPI from api-format and app generator bundle

Nest: POST /aid/export/openapi, POST /aid/export/app. Tools: api-format-to-openapi CLI. Generator: --print-bundle-json. Optional env: AID_EXPORT_API_KEY, AID_GENERATOR_ALLOW_APPLY.

tools/api-format-to-openapi/package.json

@@ -0,0 +1,10 @@
+{
+  "name": "api-format-to-openapi",
+  "private": true,
+  "type": "module",
+  "description": "Конвертация доменного api-format в OpenAPI 3.0 (детерминированно или через LLM)",
+  "scripts": {
+    "convert": "node convert.mjs --in examples/api-format.example.json --out ../../openapi.generated.json",
+    "convert:llm": "node convert.mjs --mode llm --in examples/api-format.example.json --out ../../openapi.llm.json"
+  }
+}