validate hinted attributes on subcontrollers

[jsouter]

Oversight from #187

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.36%. Comparing base (9c2042a) to head (6a666e1).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #209      +/-   ##
==========================================
+ Coverage   92.34%   92.36%   +0.02%     
==========================================
  Files          40       40              
  Lines        2077     2083       +6     
==========================================
+ Hits         1918     1924       +6     
  Misses        159      159              

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[jsouter]

We're currently not checking for non generic alias types e.g.

class MyController:
    my_attr: AttrR
    my_attr_unknown_access_mode: Attribute

Might also be good to validate hinted subcontrollers, though I guess they're not usually dot-accessed.

e: pushed something, setting as draft until I fix some logic with how hinting as an Attribute should work