fix: remove 500-row cap that truncated viewer count displays

[chiefmojo]

Problem

clampLimit() in _helpers.ts hard-caps query limits at 500 rows. The viewer's trace and episode count displays fetch the first N rows to count totals, so any store with more than 500 items shows a truncated count.

Fix

Raise the cap from 500 to 100,000. This is a safety guard against pathological inputs, not a query-size policy — reasonable operators setting limit: 10_000 for bulk exports should not be silently truncated.

export function clampLimit(n: number): number {
  if (!Number.isFinite(n) || n <= 0) return 50;
  return Math.min(Math.trunc(n), 100_000);
}