Kalshi Weather Logger
Routes:
  /run                 POST - trigger a manual snapshot now
  /backfill            GET  - backfill historical data (?series=KXHIGHNY&days=65)
  /series              GET  - list all tracked series with volume
  /status              GET  - database stats
  /heartbeat           GET  - last cron run status
  /edge-v2             GET  - edge data per ticker+hour (?tickers=...&days=...)
  /combined-edge       GET  - edge + NWS forecast accuracy combined
  /forecast-edge       GET  - NWS forecast accuracy per ticker+hour
  /forecast-edge-priced GET - accuracy minus yes_ask edge across all 3 providers
  /stop-loss-analysis  GET  - hypothetical exit on Stats YES single-bracket bets when no longer top
  /gain-analysis       GET  - per-bet hourly position value for gain/peak analysis
  /bracket-rank-combined GET - opening edge distribution data
  /series-dates        GET  - dates logged per series
  /market-prices       GET  - live Kalshi prices (?event=...)
  /fills/sync          POST - pull fills from Kalshi API into D1
  /fills               GET  - return fills with optional filters
  /nws-run             POST - trigger NWS forecast log now
  /update-actuals      POST - backfill NWS actual high/low temps
  /reprocess-top-bracket POST - recompute bracket_rank for all historical data
  /forecast-log-csv    GET  - download forecast_log as CSV
  /orderbook-csv       GET  - download orderbook_log as CSV (?series=...)
  /export-csv          GET  - download snapshots as CSV (?ticker=...&since=...)