chore(db): regenerate database code after schema changes

- Regenerate queries.sql.go with refresh token queries
- Update models.go with RefreshTokens type
- Update querier.go with new query methods
- Update db.go with generated code

internal/database/models.go

@@ -175,6 +175,15 @@ type ReadingProgress struct {
 	LastReadAt  pgtype.Timestamptz `db:"last_read_at" json:"last_read_at"`
 }
 
+type RefreshTokens struct {
+	ID        pgtype.UUID        `db:"id" json:"id"`
+	UserID    pgtype.UUID        `db:"user_id" json:"user_id"`
+	Token     string             `db:"token" json:"token"`
+	ExpiresAt pgtype.Timestamptz `db:"expires_at" json:"expires_at"`
+	CreatedAt pgtype.Timestamptz `db:"created_at" json:"created_at"`
+	RevokedAt pgtype.Timestamptz `db:"revoked_at" json:"revoked_at"`
+}
+
 type Users struct {
 	ID                   pgtype.UUID        `db:"id" json:"id"`
 	Email                string             `db:"email" json:"email"`