Refactor handlers

[smallwat3r]

Refactor how handlers handle requests.
Also ensure to use typing.TYPE_CHECKING flag.

[codecov]

Codecov Report

Attention: 18 lines in your changes are missing coverage. Please review.

Comparison is base (ab0a8e0) 97.56% compared to head (1e93ce9) 94.17%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #403      +/-   ##
==========================================
- Coverage   97.56%   94.17%   -3.39%     
==========================================
  Files          14       14              
  Lines         451      498      +47     
==========================================
+ Hits          440      469      +29     
- Misses         11       29      +18     

Files	Coverage Δ
shhh/__init__.py	100.00% <100.00%> (ø)
shhh/api/schemas.py	98.18% <80.00%> (-1.82%)	⬇️
shhh/scheduler/tasks.py	95.00% <75.00%> (-5.00%)	⬇️
shhh/api/api.py	88.46% <75.00%> (-11.54%)	⬇️
shhh/config.py	80.43% <50.00%> (-5.28%)	⬇️
shhh/entrypoint.py	94.62% <66.66%> (-3.11%)	⬇️
shhh/liveness.py	92.18% <57.14%> (-4.48%)	⬇️
shhh/api/handlers.py	94.52% <93.65%> (-5.48%)	⬇️

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.