Replace the activator access address from Pod IP to a more solid solution

<!-- Please only use this template for submitting enhancement requests --> **What would you like to be added**: See discussion here: https://github.com/InftyAI/llmaz/pull/498#discussion_r2479021076 **Why is this needed**: **Completion requirements**: This enhancement requires the following artifacts: - [ ] Design doc - [ ] API change - [ ] Docs update The artifacts should be linked in subsequent comments.