feat: 게시판 추천/비추천 + 작성자 아바타 + 추천자 + 활동 포인트

- 작성자 아바타: post/comment 조회 시 member JOIN(google_picture/profile_image),
  목록·상세·댓글 응답에 노출
- 추천/비추천: post_vote/comment_vote 테이블 + 토글 API
  (POST /board/posts|comments/{id}/vote), 게시글/댓글 응답에 up/down/myVote
- 추천자 목록: GET /board/posts/{id}/recommenders + PostDetail.recommenders
- 포인트: member.points + point_history. 글/댓글 작성 시 10P, 하루 3회 한도(합산).
  PointService, GET /auth/points, MemberResponse.points 노출
- @MapperScan 에 point.mapper 추가, AuthController WebMvc 테스트 MockBean 보강

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/main/resources/mapper/MemberMapper.xml

@@ -16,13 +16,14 @@
         <result property="profileImage" column="profile_image"/>
         <result property="role" column="role"/>
         <result property="plan" column="plan"/>
+        <result property="points" column="points"/>
         <result property="status" column="status"/>
         <result property="createdAt" column="created_at"/>
         <result property="updatedAt" column="updated_at"/>
     </resultMap>
 
     <sql id="columns">
-        id, login_id, password, name, email, provider, provider_id, google_id, google_picture, profile_image, role, plan, status, created_at, updated_at
+        id, login_id, password, name, email, provider, provider_id, google_id, google_picture, profile_image, role, plan, points, status, created_at, updated_at
     </sql>
 
     <select id="findById" parameterType="long" resultMap="memberResultMap">
@@ -31,7 +32,7 @@
 
     <!-- 관리자 목록: 무거운 profile_image(MEDIUMTEXT)·password 는 제외하고 가볍게 조회 -->
     <select id="findAll" resultMap="memberResultMap">
-        SELECT id, login_id, name, email, provider, provider_id, google_id, role, plan, status, created_at, updated_at
+        SELECT id, login_id, name, email, provider, provider_id, google_id, role, plan, points, status, created_at, updated_at
         FROM member ORDER BY id
     </select>