feat(router): request rate limit configuration

[kon14]

This PR introduces (limited) configuration options for client API request rate limiting.
Namely, it allows for configuring the maximum amount of requests per interval and interval duration.

-maxRequests: Maximum number of allowed user requests per reset interval.
-resetInterval: Request count reset timeframe. Expressed in seconds.
-exceedQuotaPenaltyDuration: Penalty duration for which to automatically block any subsequent requests once rate limit is exceeded. Expressed in seconds.

I was originally going to also expose an option for configuring the timeout period in exceedQuotaPenaltyDuration, but given how that could allow admins that are unfamiliar with said mechanic's internals to effectively perma-ban their own, as well as others', IPs by accident, I settled on a hardcoded 10s setting for this.

We should revisit the latter once the UI rework is finished, enabling this option and exposing endpoints for listing and managing active blocks.

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update
• Refactor
• Build-related changes
• Other (please describe)

Does this PR introduce a breaking change?

• Yes
• No

The PR fulfills these requirements:

• It's submitted to the main branch
• When resolving a specific issue, it's referenced in the PR's description (e.g. fix #xxx, where "xxx" is the issue number)

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature

Other information:

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