Add daily BTC/USD endpoint with historical caching and Swagger UI

resources/migrations/20260317000000-create-kraken-day-history.down.sql

@@ -0,0 +1 @@
+DROP TABLE kraken_day_history;

resources/migrations/20260317000000-create-kraken-day-history.up.sql

@@ -0,0 +1,11 @@
+CREATE TABLE kraken_day_history (
+  ts          BIGINT         NOT NULL PRIMARY KEY,
+  open        NUMERIC(18,8)  NOT NULL,
+  high        NUMERIC(18,8)  NOT NULL,
+  low         NUMERIC(18,8)  NOT NULL,
+  close       NUMERIC(18,8)  NOT NULL,
+  vwap        NUMERIC(18,8)  NOT NULL,
+  volume      NUMERIC(24,8)  NOT NULL,
+  trade_count INTEGER        NOT NULL,
+  created_at  TIMESTAMPTZ    NOT NULL DEFAULT NOW()
+);

resources/queries.sql

@@ -47,6 +47,26 @@ SET open = EXCLUDED.open,
 -- :doc Get the most recent Kraken daily candle by timestamp
 SELECT ts FROM kraken_day ORDER BY ts DESC LIMIT 1
 
+-- :name get-kraken-day-by-ts :? :1
+SELECT ts, open, high, low, close, vwap, volume, trade_count
+FROM kraken_day WHERE ts = :ts
+
+-- :name get-kraken-day-history-by-ts :? :1
+SELECT ts, open, high, low, close, vwap, volume, trade_count
+FROM kraken_day_history WHERE ts = :ts
+
+-- :name upsert-kraken-day-history! :! :n
+INSERT INTO kraken_day_history (ts, open, high, low, close, vwap, volume, trade_count)
+VALUES (:ts, :open, :high, :low, :close, :vwap, :volume, :trade-count)
+ON CONFLICT (ts) DO UPDATE
+SET open = EXCLUDED.open,
+    high = EXCLUDED.high,
+    low = EXCLUDED.low,
+    close = EXCLUDED.close,
+    vwap = EXCLUDED.vwap,
+    volume = EXCLUDED.volume,
+    trade_count = EXCLUDED.trade_count
+
 -- :name insert-strike-price! :! :n
 -- :doc Insert a Strike ticker snapshot
 INSERT INTO strike_price (rates, quote_sats) VALUES (:rates, :quote-sats)