CSV Upload "Succeeds" when no result UUID's are valid and nothing is uploaded

[SRGDamia1]

In a file with a malformed result UUID header, no valid result UUID's are found. But a successful upload message is still returned because not-valid UUIDs are simply ignored:

monitor-my-watershed/src/dataloaderservices/views.py

Lines 352 to 357 in fff01cd

	for sensor in sensors:
	uuid = str(sensor.result_uuid)
	if uuid not in results_mapping["results"]:
	# TODO - consider revised approach where we loop over column in CSV and not all sensors
	# this would allow us to return warning that result uuid is not recognized.
	continue

This is very confusing to the user when a success message appears but no data is uploaded. A warning message should appear for each column that doesn't have a valid UUID and a failure message should appear if no data at all is accepted.

In the file screenshot below which triggered the problem, the colon is missing in the Result UUID: header.