anti 2dd86fb3bb perf: cache /bounty, /logs/histogram, /deckies; bump /config TTL to 5s ...

Round-2 follow-up: profile at 500c/u showed _execute still dominating
the uncached read endpoints (/bounty 76%, /logs/histogram 73%,
/deckies 56%). Same router-level TTL pattern as /stats — 5s window,
asyncio.Lock to collapse concurrent calls into one DB hit.

- /bounty: cache default unfiltered page (limit=50, offset=0,
  bounty_type=None, search=None). Filtered requests bypass.
- /logs/histogram: cache default (interval_minutes=15, no filters).
  Filtered / non-default interval requests bypass.
- /deckies: cache full response (endpoint takes no params).
- /config: bump _STATE_TTL from 1.0 to 5.0 — admin writes are rare,
  1s was too short for bursts to coalesce at high concurrency.

2026-04-17 19:30:11 -04:00

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