ref(backend/api/get/get_post_list) add category, header_img

backend/src/model/mod.rs

@@ -5,6 +5,8 @@ CREATE TABLE IF NOT EXISTS Post
 (
     post_id      UUID PRIMARY KEY,
     title        VARCHAR(255) NOT NULL,
+    category     VARCHAR(255) NOT NULL,
+    header_img   TEXT,
     summary      TEXT,
     sub_title    TEXT,
     content      TEXT         NOT NULL,