fix: 复合主键表改为单字段 id 以支持 ent 完整生成

desc/sql/community/comment_likes.sql

@@ -1,10 +1,11 @@
 CREATE TABLE comment_likes
 (
+    id         BIGINT PRIMARY KEY,
     comment_id BIGINT      NOT NULL,
     user_id    BIGINT      NOT NULL,
     created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
 
-    PRIMARY KEY (comment_id, user_id)
+    UNIQUE (comment_id, user_id)
 );
 
 CREATE INDEX idx_comment_likes_lookup ON comment_likes (user_id, comment_id);