Validate add/record operations for instruments

[lzchen]

Fixes #2393

@ocelotl
I know some of these MAY get addressed in an abstract manner with your error handling pr but just adding these checks for now for completion and until we decide to move forward with a generic error handling method. Other language implementations have this in the SDK as well.

[ocelotl]

Fixes #2393

@ocelotl I know some of these MAY get addressed in an abstract manner with your error handling pr but just adding these checks for now for completion and until we decide to move forward with a generic error handling method. Other language implementations have this in the SDK as well.

Minor nits only, approved 😎

Just to be clear, the error handling mechanism will not address any of these checks in the sense that it will not implement the checks themselves. What would happen if the error handling mechanism was in place is that these checks would be still implemented somewhere (in the SDK or in the API (the latter would make it much easier to handle errors)), but they would raise an exception instead of logging a warning. What the error handling mechanism would do is to turn that exception into a warning (not to be confused with a logging warning) and handle it appropriately. ✌️