Extract ResolvesCallbackArguments trait, enable in AuthBasic

[alganet]

The duplicated resolveCallbackArguments() method in AbstractRoute and AbstractSyncedRoutine is extracted into a shared trait. AuthBasic now uses the trait so its callback can type-hint ServerRequestInterface to conditionally skip auth based on HTTP method (e.g. allow reads, require credentials for writes). Backward compatible — existing callbacks without PSR-7 hints behave identically.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.91%. Comparing base (56231a7) to head (3a953b6).

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #177      +/-   ##
============================================
- Coverage     96.91%   96.91%   -0.01%     
  Complexity      437      437              
============================================
  Files            32       33       +1     
  Lines          1103     1101       -2     
============================================
- Hits           1069     1067       -2     
  Misses           34       34              

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