fix: change rate-limit log level from info to debug

[iegl3]

Summary

In this pull request, the following changes are made:

• Changed log.info() to log.debug() for the rate-limit "remaining requests" message in server/rate-limiter.js. This message logs on every single request, which floods the log output unnecessarily. Debug level keeps it available when needed but hidden by default.

• Relates to RATE-LIMIT log message every 10 seconds, even with all monitors paused. #5122
• Resolves RATE-LIMIT log message every 10 seconds, even with all monitors paused. #5122

Please follow this checklist to avoid unnecessary back and forth (click to expand)

• ⚠️ If there are Breaking change (a fix or feature that alters existing functionality in a way that could cause issues) I have called them out
• 🧠 I have disclosed any use of LLMs/AI in this contribution and reviewed all generated content.
  I understand that I am responsible for and able to explain every line of code I submit.
• 🔍 Any UI changes adhere to visual style of this project.
• 🛠️ I have self-reviewed and self-tested my code to ensure it works as expected.
• 📝 I have commented my code, especially in hard-to-understand areas (e.g., using JSDoc for methods).
• 🤖 I added or updated automated tests where appropriate.
• 📄 Documentation updates are included (if applicable).
• 🧰 Dependency updates are listed and explained.
• ⚠️ CI passes and is green.

Screenshots for Visual Changes

• UI Modifications: Highlight any changes made to the user interface.
• Before & After: Include screenshots or comparisons (if applicable).

Event	Before	After
UP
DOWN
Certificate-expiry
Testing

[github-actions]

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[louislam]

We have the same pr 2 years ago, see the review here.

#5402 (comment)

[CommanderStorm]

Even though this might be annoying to you, please fix this properly.

If very few requests are remaining, this is a warning, else debug.

[CommanderStorm]

@mahdirajaee feel free to contribute the proper fix for this if this is annoying you. This PR seems a bit stuck.
I won't make it debug without the change that louis asked.