perf: skip segment leaf expansion in membersToMerge query

Signed-off-by: Yeganathan S <63534555+skwowet@users.noreply.github.com>

Author: skwowet

backend/src/database/repositories/memberRepository.ts

@@ -294,11 +294,9 @@ class MemberRepository {
     const HIGH_CONFIDENCE_LOWER_BOUND = 0.9
     const MEDIUM_CONFIDENCE_LOWER_BOUND = 0.7
 
-    const currentSegments = SequelizeRepository.getSegmentIds(options)
-
-    const segmentIds = (
-      await new SegmentRepository(options).getSegmentSubprojects(currentSegments)
-    ).map((s) => s.id)
+    // Member segments are aggregated at each hierarchy level (group -> project -> subproject).
+    // Match the selected segment ID directly; do not expand to leaf subprojects.
+    const segmentIds = SequelizeRepository.getSegmentIds(options)
 
     if (segmentIds.length === 0) {
       return args.countOnly