Unit test failure: `ClusterFamilyTest.FlushSlots`

[abhijat]

https://github.com/dragonflydb/dragonfly/actions/runs/15675879494/job/44155931707#step:8:18036

[ RUN      ] ClusterFamilyTest.FlushSlots
I20250616 08:56:27.345012 17926 proactor_pool.cc:149] Running 3 io threads
I20250616 08:56:27.346189 17926 test_utils.cc:259] Starting FlushSlots
I20250616 08:56:27.380762 17997 cluster_family.cc:681] Got DFLYCLUSTER FLUSHSLOTS [0,0]
../src/server/cluster/cluster_family_test.cc:727: Failure
Value of: RunPrivileged({"dflycluster", "getslotinfo", "slots", "0", "1"})
Expected: resp array (value: 320-byte object <4C-3F DE-00 00-00 00-00 59-42 DD-00 00-00 00-00 E2-44 DD-00 00-00 00-00 40-60 49-00 00-00 00-00 D6-44 DD-00 00-00 00-00 02-51 AC-0C 00-00 00-00 F0-40 3E-F2 FF-7F 00-00 00-00 00-00 00-00 00-00 ... 70-42 DD-00 00-00 00-00 02-4A 9B-80 95-27 16-B2 D0-41 3E-F2 FF-7F 00-00 00-00 00-00 00-00 00-00 00-42 3E-F2 FF-7F 00-00 C0-50 AC-0C 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00>)
  Actual: [[i0,'key_count',i31,'total_reads',i0,'total_writes',i52,'memory_bytes',i0],[i1,'key_count',i48,'total_reads',i0,'total_writes',i48,'memory_bytes',i0]] (of type facade::RespExpr), whose given property is Vec: [[i0,'key_count',i31,'total_reads',i0,'total_writes',i52,'memory_bytes',i0],[i1,'key_count',i48,'total_reads',i0,'total_writes',i48,'memory_bytes',i0]]
, whose element #0 doesn't match, whose given property is Vec: [i0,'key_count',i31,'total_reads',i0,'total_writes',i52,'memory_bytes',i0]
, whose element #2 doesn't match, 
Actual : 31 expected: 0

I20250616 08:56:27.387416 17997 cluster_family.cc:681] Got DFLYCLUSTER FLUSHSLOTS [0,1]
I20250616 08:56:27.406896 17926 test_utils.cc:221] Finishing FlushSlots
[  FAILED  ] ClusterFamilyTest.FlushSlots (62 ms)

[abhijat]

Saw this once on the pr #5289 but haven't been able to reproduce this locally, in the failing instance, even after flushslots there are keys remaining.