[BUG] Continue button is disabled after fetching OSM labels

[jeafreezy]

Describe the bug
Ideally, after fetching OSM labels, the users should be able to proceed to the next step; however, sometimes it gets buggy, and this button gets disabled.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://fair-dev.hotosm.org/ai-models/365/training-area
2. Login if you haven't already.
3. Draw a new training area.
4. Click on the map icon to fetch OSM labels.
5. You will notice that the 'CONTINUE' button is disabled.

Expected behavior
The continue button should be enabled after fetching training labels for all training areas.

Screenshots
Unfortunately, I can not reproduce this on my computer. However, I once experienced this before and during user testing.

Desktop:

• OS: Mac M3 Pro
• Browser: I once experienced this on Chrome.

Additional context

The logic that enables the continue button in the training area page happens here:

fAIr/frontend/src/features/model-creation/components/progress-buttons.tsx

Lines 136 to 139 in df81338

	} else if (currentPath.includes(MODELS_ROUTES.TRAINING_AREA)) {
	return (
	hasLabeledTrainingAreas && hasAOIsWithGeometry && formData.oamBounds
	);

where:

fAIr/frontend/src/app/providers/models-provider.tsx

Lines 444 to 457 in df81338

	// Confirm that all the training areas labels has been retrieved
	const hasLabeledTrainingAreas =
	formData.trainingAreas.length > 0 &&
	formData.trainingAreas.filter(
	(aoi: TTrainingAreaFeature) => aoi.properties.label_fetched === null,
	).length === 0;
	// Confirm that all of the training areas has a geometry
	const hasAOIsWithGeometry =
	formData.trainingAreas.length > 0 &&
	formData.trainingAreas.filter(
	(aoi: TTrainingAreaFeature) => aoi.geometry === null,
	).length === 0;

Two things could be the reason for the bug:

1. The formData is not updated after successfully pooling the task because after pooling, a prefetch is done to get the training areas with their latest properties (especially aoi.properties.label_fetched should change to 1 from null).
2. The formData is updated, but the backend has not updated the label fetched status to be aoi.properties.label_fetched yet.

Nevertheless, a proper review is required to make it stable and work as expected.