The `onProjectReady` method is called after the `QgsProject` instance is ready for the request and before entering the main switch for core services.
The `onRequestReady` method is called after the `QgsRequestHandler` is ready and populated with parameters but before the `QgsProject` instance is ready.
The `onProjectReady` method coud be used to perform operation at the project level like adding variables, checking vector layer categories, etc.
Funded by 3Liz
The original workaround was only supposed to apply to QList/
QVector of QVariantMaps. By replacing them all in sip we
break mapping of signals defined in c++ which are emitted
by Python code.
Fixes exceptions after running processing algorithms in Qt6
builds.
