Error when using TimescaleDB copyFrom format

When executing the following lines, I encounter multiple errors:
```
$GOPATH/bin/bulk_data_gen -format timescaledb-copyFrom | $GOPATH/bin/bulk_load_timescale
$GOPATH/bin/bulk_data_gen -format timescaledb-copyFrom | $GOPATH/bin/bulk_load_timescale -format timescaledb-copyFrom
```
Two types of such errors are as follows:
> cannot unmarshall 0 item: proto: FlatPoint: wiretype end group for non-group

> cannot unmarshall 0 item: proto: wrong wireType = 1 for field MeasurementName

Start by running the two reported bulk_data_gen and bulk_load_timescale pipelines, then trace the timescaledb-copyFrom format through those entry points and the protobuf unmarshalling that reports the errors. Done means both commands process the generated data without the FlatPoint or MeasurementName wire-type errors.

Written by the indexing model from the issue text.