Set Primary Key for Notifications Table

[azghr]

No description provided.

[azghr]

@maxdml please review this PR.

[maxdml]

Thanks @azghr . We're going to have to wait that #261 is done, so we can add this as migration 10 -- we are maintaining a 1:1 parity on DB migrations across the SDKs.

[maxdml]

@azghr I am adding the 9th migration here #262. Can you update this PR to make this the 10th migration? We want to port all the existing migrations to Golang today.

[azghr]

Thanks! @maxdml let me handle this