You must provide a copy of the marriage certificate/contract to obtain a spouse visit visa.
Source: The guy who is responsible about helping employees obtain visas in my multi-national company in Saudi Arabia.
Yes, you can perform Umrah while on a visit eVisa.
From the official eVisa website:
8.7 An eVisa is granted solely for tourist purposes or for the purpose of performing a umrah and it is not considered a visa for work. If you are granted an eVisa, you must not take up paid employment during your visit to KSA.
Yes, you can perform Umrah on a Saudi Arabian e-visa.
From this news article:
Among the most important features of the Saudi tourist visa, is the visa holder can benefit from it in performing Umrah, women need not be accompanied by a male relative, other than in the Haj season, and there is no need for a sponsor (kafeel) the way it is required for work ...
In September 2019 Saudi Arabia announced it is going to open its borders for tourists with a new visa regime.
BBC: Saudi Arabia's tourist spots you are now free to visit
The Saudi Visa Portal lists Canada as one of the 49 countries in North America, Europe, Asia and Oceania eligible for the new visa regime.
According to the portal:
The eVisa will be ...