ccfraft: Use `m.prevLogTerm` in `RejectAppendEntriesRequest` when finding highest match (#6028)

doc/schemas/mccf/2023-06-01-preview/examples/ServiceState_GetJoinPolicies.json

@@ -20,7 +20,11 @@
             "key9497": "NiNrjmA9/aSj4F076mVdrA=="
           },
           "uvmEndorsements": {
-            "key9553": "cbneXARxfLGcqw3cc09mYQ=="
+            "did:x509:0:sha256:I__iuL25oXEVFdTP_aBLx_eT1RPHbCQ_ECBQfYZpt9s::eku:1.3.6.1.4.1.311.76.59.1.2": {
+              "ContainerPlat-AMD-UVM": {
+                "svn": "100"
+              }
+            }
           }
         }
       }

doc/schemas/mccf/2023-06-01-preview/examples/StateDigests_Get.json

@@ -8,7 +8,8 @@
   "responses": {
     "200": {
       "body": {
-        "digest": "1cdc59855bb6b7edee42769ca3767bc9684b7a62ffcfcb8751a75dbe71c28e49"
+        "memberId": "f8ac7c60c164f7f13c04ba41645b18eabcc55a8f799c83a90d001f4e89907970",
+        "stateDigest": "1cdc59855bb6b7edee42769ca3767bc9684b7a62ffcfcb8751a75dbe71c28e49"
       }
     }
   }

doc/schemas/mccf/2023-06-01-preview/examples/StateDigests_Update.json

@@ -9,7 +9,8 @@
   "responses": {
     "200": {
       "body": {
-        "digest": "1cdc59855bb6b7edee42769ca3767bc9684b7a62ffcfcb8751a75dbe71c28e49"
+        "memberId": "f8ac7c60c164f7f13c04ba41645b18eabcc55a8f799c83a90d001f4e89907970",
+        "stateDigest": "1cdc59855bb6b7edee42769ca3767bc9684b7a62ffcfcb8751a75dbe71c28e49"
       }
     }
   }

tla/consensus/ccfraft.tla

@@ -941,7 +941,7 @@ RejectAppendEntriesRequest(i, j, m, logOk) ==
                              dest           |-> j],
                              m)
                    \/ /\ prevTerm # 0
-                      /\ LET lli == FindHighestPossibleMatch(log[i], m.prevLogIndex, m.term)
+                      /\ LET lli == FindHighestPossibleMatch(log[i], m.prevLogIndex, m.prevLogTerm)
                          IN Reply([type        |-> AppendEntriesResponse,
                                 success        |-> FALSE,
                                 term           |-> IF lli = 0 THEN StartTerm ELSE log[i][lli].term,