Interim while bringing sqlc in

internal/domain64/schema.sql

@@ -0,0 +1,9 @@
+CREATE TABLE domain64 (
+  id INT PRIMARY KEY,
+  url TEXT,
+  d64 BIGINT,
+  tld_id INT,
+  domain_id INT,
+  subdomain_id INT,
+  path_id INT
+)