Initial CPONE middleware implementation

sqlc.yaml

@@ -0,0 +1,11 @@
+version: "2"
+sql:
+  - engine: "mysql"
+    schema: "sqlc/schema.sql"
+    queries: "sqlc/query.sql"
+    gen:
+      go:
+        package: "db"
+        out: "internal/db"
+        emit_json_tags: true
+        emit_prepared_queries: false