Fix calendar migration

```plaintext
move { sourceDomain: 'calendar', query: { _class: { '$in': [Array] } } }
failed to upload domain="event" err={"message":"null value in column \"dueDate\" violates not-null constraint","stack":"PostgresError: null value in column \"dueDate\" violates not-null constraint\n at ErrorResponse (/Users/haiodo/Develop/private/platform/dev/tool/bundle/bundle.js:213714:31)\n at handle (/Users/haiodo/Develop/private/platform/dev/tool/bundle/bundle.js:213469:11)\n at Socket.data (/Users/haiodo/Develop/private/platform/dev/tool/bundle/bundle.js:213282:13)\n at Socket.emit (node:events:518:28)\n at addChunk (node:internal/streams/readable:561:12)\n at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)\n at Readable.push (node:internal/streams/readable:392:5)\n at TCP.onStreamRead (node:internal/stream_base_commons:191:23)","name":"PostgresError","severity_local":"ERROR","severity":"ERROR","code":"23502","file":"errors.go","line":"73","routine":"NewNonNullViolationError"}
PostgresError: null value in column "dueDate" violates not-null constraint
at ErrorResponse (/Users/haiodo/Develop/private/platform/dev/tool/bundle/bundle.js:213714:31)
at handle (/Users/haiodo/Develop/private/platform/dev/tool/bundle/bundle.js:213469:11)
at Socket.data (/Users/haiodo/Develop/private/platform/dev/tool/bundle/bundle.js:213282:13)
at Socket.emit (node:events:518:28)
at addChunk (node:internal/streams/readable:561:12)
at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
at Readable.push (node:internal/streams/readable:392:5)
at TCP.onStreamRead (node:internal/stream_base_commons:191:23) {
severity_local: 'ERROR',
severity: 'ERROR',
code: '23502',
file: 'errors.go',
line: '73',
routine: 'NewNonNullViolationError'
}
```

_{Huly®: UBERF-8616}