Updated sqlc files to split out queries by domain.

sql/schema.sql

@@ -5,3 +5,13 @@ CREATE TABLE users (
   created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
 );
 
+CREATE TABLE refresh_tokens (
+  id          BIGSERIAL    PRIMARY KEY,
+  user_id     BIGINT       NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  token_hash  TEXT         NOT NULL UNIQUE,
+  created_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+  expires_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX idx_refresh_tokens_token_hash ON refresh_tokens(token_hash);
+CREATE INDEX idx_refresh_tokens_user_id ON refresh_tokens(user_id);