chore: initial commit

internal/db/schema/sys_roles.sql

@@ -0,0 +1,20 @@
+CREATE TABLE sys_roles
+(
+    id         INTEGER PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    name       TEXT      NOT NULL,
+    code       TEXT      NOT NULL UNIQUE,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ
+);
+
+CREATE TRIGGER update_sys_roles_updated_at
+    BEFORE UPDATE
+    ON sys_roles
+    FOR EACH ROW
+EXECUTE FUNCTION update_updated_at_column();
+
+COMMENT ON COLUMN sys_roles.id IS '主键ID';
+COMMENT ON COLUMN sys_roles.name IS '角色名称';
+COMMENT ON COLUMN sys_roles.code IS '角色编码，唯一';
+COMMENT ON COLUMN sys_roles.created_at IS '创建时间';
+COMMENT ON COLUMN sys_roles.updated_at IS '更新时间';