logging: throttle log lines that clients can trigger at will

Evicted-JWT replays, blocked sends from frozen or limited accounts and
failed payment retries each logged one line per request, so a looping client
could flood the log, and an evicted token replayed across a proxy pool made
atk-autoban.sh block every IP it saw. Add quiet()/suppressed() in
lib/logging.ts: the first occurrence per key logs as before, repeats within
the window are counted and reported on the next line that gets through. The
evicted-auth summary line is worded so the auto-banner ignores it.

Co-Authored-By: Claude Fable 5.1 <[email protected]>

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