Order client audit log entries consistently in export

The following test fails infrequently. I've seen this failure locally, and it's also been seen on CircleCI:

```
1) api: /forms/:id/submissions
.csv.zip GET
should return worker-processed consolidated client audit log attachments:

AssertionError: expected 'instance ID,event,node,start,end,latitude,longitude,accuracy,old-value,new-value\none,e,/data/e,2000-01-01T00:11,,,,,hh,ii\none,d,/data/d,2000-01-01T00:10,,10,11,12,gg,\none,c,/data/c,2000-01-01T00:03,2000-01-01T00:04,7,8,9,ee,ff\none,b,/data/b,2000-01-01T00:02,2000-01-01T00:03,4,5,6,cc,dd\none,a,/data/a,2000-01-01T00:01,2000-01-01T00:02,1,2,3,aa,bb\ntwo,h,/data/h,2000-01-01T00:06,2000-01-01T00:07,-5,-6,,ee,ff\ntwo,g,/data/g,2000-01-01T00:05,2000-01-01T00:06,-3,-4,,cc,dd\ntwo,f,/data/f,2000-01-01T00:04,2000-01-01T00:05,-1,-2,,aa,bb\n' to be 'instance ID,event,node,start,end,latitude,longitude,accuracy,old-value,new-value\none,a,/data/a,2000-01-01T00:01,2000-01-01T00:02,1,2,3,aa,bb\none,b,/data/b,2000-01-01T00:02,2000-01-01T00:03,4,5,6,cc,dd\none,c,/data/c,2000-01-01T00:03,2000-01-01T00:04,7,8,9,ee,ff\none,d,/data/d,2000-01-01T00:10,,10,11,12,gg,\none,e,/data/e,2000-01-01T00:11,,,,,hh,ii\ntwo,f,/data/f,2000-01-01T00:04,2000-01-01T00:05,-1,-2,,aa,bb\ntwo,g,/data/g,2000-01-01T00:05,2000-01-01T00:06,-3,-4,,cc,dd\ntwo,h,/data/h,2000-01-01T00:06,2000-01-01T00:07,-5,-6,,ee,ff\n'
+ expected - actual

instance ID,event,node,start,end,latitude,longitude,accuracy,old-value,new-value
+one,a,/data/a,2000-01-01T00:01,2000-01-01T00:02,1,2,3,aa,bb
+one,b,/data/b,2000-01-01T00:02,2000-01-01T00:03,4,5,6,cc,dd
+one,c,/data/c,2000-01-01T00:03,2000-01-01T00:04,7,8,9,ee,ff
+one,d,/data/d,2000-01-01T00:10,,10,11,12,gg,
one,e,/data/e,2000-01-01T00:11,,,,,hh,ii
-one,d,/data/d,2000-01-01T00:10,,10,11,12,gg,
-one,c,/data/c,2000-01-01T00:03,2000-01-01T00:04,7,8,9,ee,ff
-one,b,/data/b,2000-01-01T00:02,2000-01-01T00:03,4,5,6,cc,dd
-one,a,/data/a,2000-01-01T00:01,2000-01-01T00:02,1,2,3,aa,bb
+two,f,/data/f,2000-01-01T00:04,2000-01-01T00:05,-1,-2,,aa,bb
+two,g,/data/g,2000-01-01T00:05,2000-01-01T00:06,-3,-4,,cc,dd
two,h,/data/h,2000-01-01T00:06,2000-01-01T00:07,-5,-6,,ee,ff
-two,g,/data/g,2000-01-01T00:05,2000-01-01T00:06,-3,-4,,cc,dd
-two,f,/data/f,2000-01-01T00:04,2000-01-01T00:05,-1,-2,,aa,bb

at Assertion.fail (node_modules/should/cjs/should.js:275:17)
at Assertion.value (node_modules/should/cjs/should.js:356:19)
at test/integration/api/submissions.js:1799:51
at runMicrotasks ()
at processTicksAndRejections (internal/process/task_queues.js:95:5)
at async Object.transaction (node_modules/slonik/dist/src/connectionMethods/transaction.js:22:24)
at async Object.createConnection (node_modules/slonik/dist/src/factories/createConnection.js:96:18)
```

I ran `make test` on CircleCI [200 times](https://github.com/getodk/central-backend/issues/588#issuecomment-1235669602), and this error came up just once (in [this](https://app.circleci.com/pipelines/github/getodk/central-backend/943/workflows/223477a5-ee43-4c3a-8964-1e37893a206a/jobs/1696/artifacts) build). The test failure is infrequent, but since it's been seen on a variety of machines, I thought I'd go ahead and file an issue. I think it's interesting that it only seems to be this test that has this ordering issue.