WIP: Migrate from GORM to sqlc - partial migration, build broken

backend/sqlc.yaml

@@ -0,0 +1,13 @@
+version: "2"
+sql:
+  - engine: "mysql"
+    queries: "./internal/db/queries"
+    schema: "./internal/db/queries/schema.sql"
+    gen:
+      go:
+        package: "db"
+        out: "./internal/db/sqlc"
+        sql_package: "database/sql"
+        emit_json_tags: true
+        emit_interface: false
+        emit_exact_table_names: false