feat: 完善后端脚手架基础能力

migrations/.gitkeep

@@ -1 +0,0 @@
-

migrations/mysql/20260809000100_create_users.sql

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+CREATE TABLE `users` (
+  `id` bigint unsigned AUTO_INCREMENT,
+  `username` varchar(64) NOT NULL,
+  `password` varchar(255) NOT NULL,
+  PRIMARY KEY (`id`),
+  UNIQUE INDEX `idx_users_username` (`username`)
+);

migrations/mysql/atlas.sum

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+h1:AuV9gfTOCOAkvdNG+rTnCuRXCsNdGIw99ESIcigZToI=
+20260809000100_create_users.sql h1:HHCsnYCu6DPnudNHIL4lR6h50Ndlr9AHcwQxD0APinM=

migrations/postgres/20260809000100_create_users.sql

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+CREATE TABLE "users" (
+  "id" bigserial,
+  "username" varchar(64) NOT NULL,
+  "password" varchar(255) NOT NULL,
+  PRIMARY KEY ("id")
+);
+CREATE UNIQUE INDEX "idx_users_username" ON "users" ("username");

migrations/postgres/atlas.sum

@@ -0,0 +1,2 @@
+h1:KL8m6Hvz0rQhkIfZfIWtoDNwAe1u9V3jCr/y1WE4rfM=
+20260809000100_create_users.sql h1:sbELXVx7emjO8qCox06MIhKn70i/adn89MUIgDTLCto=

migrations/sqlite/20260809000100_create_users.sql

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+CREATE TABLE `users` (
+  `id` integer PRIMARY KEY AUTOINCREMENT,
+  `username` text NOT NULL,
+  `password` text NOT NULL
+);
+CREATE UNIQUE INDEX `idx_users_username` ON `users` (`username`);

migrations/sqlite/atlas.sum

@@ -0,0 +1,2 @@
+h1:rMchBIYMumzVULbnGqmawAZKbkJM8S9Hjok6Qg4zagU=
+20260809000100_create_users.sql h1:JEyy3iqFHNJb4WSR8YNhbFqhxd+B3JIwqxpDWJF393o=