fix(knowledge): record a member failure only under the lease

A listing that ran past the lease TTL and then failed wrote its backoff
over the replacement run's counters and schedule. The failure ladder now
lands under the same lease guard as every other member write.

Author: waleedlatif1

apps/sim/lib/knowledge/connectors/member-sync-engine.ts

@@ -728,20 +728,23 @@ async function countDueMembers(
 }
 
 async function recordMemberFailure(
+  run: MemberSyncRun,
   member: MemberRow,
   error: unknown,
   syncIntervalMinutes: number
 ): Promise<void> {
   const failures = member.consecutiveFailures + 1
-  await db
-    .update(knowledgeConnectorMember)
-    .set({
-      consecutiveFailures: failures,
-      nextAttemptAt: new Date(Date.now() + memberFailureBackoffMs(failures, syncIntervalMinutes)),
-      lastError: getErrorMessage(error),
-      updatedAt: new Date(),
-    })
-    .where(eq(knowledgeConnectorMember.id, member.id))
+  await withMemberLease(run, (tx) =>
+    tx
+      .update(knowledgeConnectorMember)
+      .set({
+        consecutiveFailures: failures,
+        nextAttemptAt: new Date(Date.now() + memberFailureBackoffMs(failures, syncIntervalMinutes)),
+        lastError: getErrorMessage(error),
+        updatedAt: new Date(),
+      })
+      .where(eq(knowledgeConnectorMember.id, member.id))
+  )
 }
 
 /**
@@ -904,7 +907,7 @@ async function listForMember(input: {
       memberId: member.id,
       error: getErrorMessage(error),
     })
-    await recordMemberFailure(member, error, input.syncIntervalMinutes)
+    await recordMemberFailure(input.run, member, error, input.syncIntervalMinutes)
     run.result.membersFailed += 1
     return { kind: 'failed' }
   }