CREATE TABLE IF NOT EXISTS short_tf_signal_samples (
    id BIGSERIAL PRIMARY KEY,
    signal_time TEXT NOT NULL,
    symbol TEXT NOT NULL,
    timeframe TEXT NOT NULL,
    signal_code TEXT NOT NULL,
    signal_label TEXT NOT NULL,
    entry_price DOUBLE PRECISION NOT NULL,
    volume_24h DOUBLE PRECISION DEFAULT 0,
    change_24h DOUBLE PRECISION DEFAULT 0,
    gain_pct DOUBLE PRECISION DEFAULT 0,
    vol_ratio DOUBLE PRECISION DEFAULT 0,
    body_ratio DOUBLE PRECISION DEFAULT 0,
    age_bars INTEGER DEFAULT 0,
    resonance INTEGER NOT NULL DEFAULT 0,
    context_json TEXT DEFAULT '{}',
    review_status TEXT NOT NULL DEFAULT 'pending',
    created_at TEXT NOT NULL
);

CREATE INDEX IF NOT EXISTS idx_short_tf_samples_time ON short_tf_signal_samples(signal_time DESC);
CREATE INDEX IF NOT EXISTS idx_short_tf_samples_symbol_time ON short_tf_signal_samples(symbol, signal_time DESC);
CREATE INDEX IF NOT EXISTS idx_short_tf_samples_code_time ON short_tf_signal_samples(signal_code, signal_time DESC);
CREATE UNIQUE INDEX IF NOT EXISTS idx_short_tf_samples_dedupe
    ON short_tf_signal_samples(symbol, timeframe, signal_code, signal_time);