重构现代化 FastAPI 后端项目框架

resources/sql/create/25.vertices.sql

@@ -0,0 +1,11 @@
+-- [VERTICES]
+
+create table vertices
+(
+  _order serial primary key
+, link varchar(32) references _link(id) not null
+, x    float8 not null
+, y    float8 not null
+);
+
+-- delete when delete link