feat: 포인트 적립내역 조회 — GET /auth/point-history

- point_history 최신순 조회(최대 100건), PointHistoryResponse
- PointService.getHistory, 인터셉터 경로 등록

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

src/main/java/com/sb/web/auth/controller/AuthController.java

@@ -87,6 +87,13 @@ public class AuthController {
         return java.util.Map.of("points", pointService.getPoints(current.getId()));
     }
 
+    /** 포인트 적립/차감 내역 (최신순) */
+    @GetMapping("/point-history")
+    public java.util.List<com.sb.web.point.PointHistoryResponse> pointHistory(
+            @RequestAttribute(AuthInterceptor.CURRENT_MEMBER) SessionUser current) {
+        return pointService.getHistory(current.getId());
+    }
+
     @PutMapping("/password")
     public ResponseEntity<Void> changePassword(
             @Valid @RequestBody PasswordChangeRequest req,