price pipeline

Signed-off-by: GnomeZworc <nicolas.boufidjeline@g3e.fr>

migrations/000002_price_history_intraday.up.sql

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+-- Recréation de price_history avec support intraday (plusieurs prix par jour)
+-- Le job de nettoyage consolide à J-1 en gardant uniquement le dernier fetch
+DROP TABLE IF EXISTS price_history;
+
+CREATE TABLE price_history (
+    instrument_id INTEGER     NOT NULL REFERENCES instrument(id),
+    fetched_at    TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    prix          NUMERIC(24, 8) NOT NULL,
+    PRIMARY KEY (instrument_id, fetched_at)
+);
+SELECT create_hypertable('price_history', by_range('fetched_at'));
+CREATE INDEX idx_price_history_instrument ON price_history(instrument_id, fetched_at DESC);
+
+-- Cache OpenFIGI (ISIN → ticker Yahoo Finance) et CoinGecko (ticker → coin ID)
+CREATE TABLE instrument_ticker_cache (
+    instrument_id INTEGER     PRIMARY KEY REFERENCES instrument(id) ON DELETE CASCADE,
+    ticker        TEXT        NOT NULL,
+    fetched_at    TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);