update for 4 hour rain forecast

db/init/001_schema.sql

@@ -112,6 +112,34 @@ CREATE INDEX IF NOT EXISTS idx_predictions_rain_1h_site_ts
 CREATE INDEX IF NOT EXISTS idx_predictions_rain_1h_pending_eval
   ON predictions_rain_1h(site, evaluated_at, ts DESC);
 
+-- Rain model predictions (next 4h)
+CREATE TABLE IF NOT EXISTS predictions_rain_4h (
+  ts                    TIMESTAMPTZ NOT NULL,
+  generated_at          TIMESTAMPTZ NOT NULL DEFAULT now(),
+  site                  TEXT NOT NULL,
+  model_name            TEXT NOT NULL,
+  model_version         TEXT NOT NULL,
+  threshold             DOUBLE PRECISION NOT NULL,
+  probability           DOUBLE PRECISION NOT NULL,
+  predict_rain          BOOLEAN NOT NULL,
+
+  rain_next_4h_mm_actual DOUBLE PRECISION,
+  rain_next_4h_actual    BOOLEAN,
+  evaluated_at           TIMESTAMPTZ,
+
+  metadata              JSONB,
+
+  PRIMARY KEY (site, model_name, model_version, ts)
+);
+
+SELECT create_hypertable('predictions_rain_4h', 'ts', if_not_exists => TRUE);
+
+CREATE INDEX IF NOT EXISTS idx_predictions_rain_4h_site_ts
+  ON predictions_rain_4h(site, ts DESC);
+
+CREATE INDEX IF NOT EXISTS idx_predictions_rain_4h_pending_eval
+  ON predictions_rain_4h(site, evaluated_at, ts DESC);
+
 -- Raw retention: 90 days
 DO $$
 BEGIN