feat: add Lago integration with provisioning endpoint and service

[Husainbw786]

No description provided.

[windsurf-bot]

Other comments (3)

• src/services/lago.service.js (3-5) The environment variables (LAGO_API_URL, LAGO_API_KEY, LAGO_FREE_PLAN_CODE) are used without validation. If any of these are missing or misconfigured, the service will fail at runtime with unclear errors. Consider adding validation at startup or when the module is loaded.
• src/controllers/lago.controller.js (22-22) Missing error handling for the `ensureOrgSubscribed` call. If this function throws an exception, the request will fail without a proper error response. Consider adding a try-catch block.
• src/controllers/lago.controller.js (6-6) Consider adding more robust validation for the request body structure before accessing nested properties. The current implementation could throw an error if `data` is undefined but you try to access `data.company.id`.

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