Add provisional payout estimates

apps/labrinth/migrations/20260821120000_payout-estimates.sql

@@ -0,0 +1,21 @@
+CREATE TABLE payout_estimates (
+	period DATE NOT NULL
+		CHECK (EXTRACT(DAY FROM period) = 1),
+	user_id BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+	mod_id BIGINT NOT NULL REFERENCES mods(id) ON DELETE CASCADE,
+	amount NUMERIC(40, 20) NOT NULL
+		CHECK (amount >= 0),
+	created TIMESTAMPTZ NOT NULL,
+	date_available TIMESTAMPTZ NOT NULL,
+	calculated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+	PRIMARY KEY (period, user_id, mod_id)
+);
+
+CREATE INDEX payout_estimates_user_id
+	ON payout_estimates (user_id);
+
+CREATE INDEX payout_estimates_mod_id
+	ON payout_estimates (mod_id);
+
+CREATE INDEX payout_estimates_created
+	ON payout_estimates (created);