Payments/subscriptions support (#943)

* [wip] Payments/subscriptions support

* finish

* working payment flow

* finish subscriptions, lint, clippy, etc

* docker compose

migrations/20240702213250_subscriptions.sql

@@ -0,0 +1,34 @@
+ALTER TABLE users ADD COLUMN stripe_customer_id TEXT NULL;
+
+CREATE TABLE products (
+    id bigint PRIMARY KEY,
+    metadata jsonb NOT NULL,
+    unitary BOOLEAN NOT NULL DEFAULT FALSE
+);
+
+CREATE TABLE products_prices (
+    id bigint PRIMARY KEY,
+    product_id bigint REFERENCES products NOT NULL,
+    currency_code text not null,
+    prices jsonb NOT NULL
+);
+
+CREATE TABLE users_subscriptions (
+    id bigint PRIMARY KEY,
+    user_id bigint REFERENCES users NOT NULL,
+    price_id bigint REFERENCES products_prices NOT NULL,
+    interval text NOT NULL,
+    created timestamptz DEFAULT CURRENT_TIMESTAMP NOT NULL,
+    expires timestamptz DEFAULT CURRENT_TIMESTAMP NOT NULL,
+    last_charge timestamptz NULL,
+    status varchar(255) NOT NULL
+);
+
+CREATE UNIQUE INDEX users_stripe_customer_id
+    ON users (stripe_customer_id);
+
+CREATE INDEX products_prices_product
+    ON products_prices (product_id);
+
+CREATE INDEX users_subscriptions_users
+    ON users_subscriptions (user_id);