Use postponed evaluation of annotations

[WhyNotHugo]

Allows using simpler-styled annotations and reduces some pointless runtime evaluation.

[codecov]

Codecov Report

Merging #380 (d265bbd) into main (5c0650b) will decrease coverage by 0.02%.
The diff coverage is 88.00%.

@@            Coverage Diff             @@
##             main     #380      +/-   ##
==========================================
- Coverage   78.55%   78.54%   -0.02%     
==========================================
  Files          29       29              
  Lines        1949     1976      +27     
  Branches      241      243       +2     
==========================================
+ Hits         1531     1552      +21     
- Misses        304      308       +4     
- Partials      114      116       +2     

Files	Coverage Δ
payments/authorizenet/__init__.py	80.55% <100.00%> (+0.55%)	⬆️
payments/authorizenet/forms.py	68.00% <100.00%> (+1.33%)	⬆️
payments/braintree/__init__.py	81.48% <100.00%> (+0.71%)	⬆️
payments/braintree/forms.py	89.28% <100.00%> (+0.39%)	⬆️
payments/coinbase/__init__.py	94.54% <100.00%> (+0.10%)	⬆️
payments/cybersource/__init__.py	66.05% <100.00%> (+0.10%)	⬆️
payments/cybersource/forms.py	82.00% <100.00%> (+0.36%)	⬆️
payments/dotpay/__init__.py	87.17% <100.00%> (+0.33%)	⬆️
payments/dotpay/forms.py	92.18% <100.00%> (+0.12%)	⬆️
payments/dummy/__init__.py	86.27% <100.00%> (+0.27%)	⬆️
... and 19 more

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[WhyNotHugo]

This also fixes some accidental breakage which resulted when merging #214