Tag out-of-scope redirects as affiliates

[TheTechromancer]

Addresses #794.

[codecov]

Codecov Report

Merging #833 (47089b2) into dev (bcca96b) will increase coverage by 1%.
The diff coverage is 100%.

@@          Coverage Diff          @@
##             dev    #833   +/-   ##
=====================================
+ Coverage     92%     92%   +1%     
=====================================
  Files        291     291           
  Lines      17259   17271   +12     
=====================================
+ Hits       15779   15791   +12     
  Misses      1480    1480           

Files	Coverage Δ
bbot/core/event/base.py	95% <100%> (+1%)	⬆️
bbot/modules/internal/excavate.py	83% <100%> (ø)
...test/test_step_2/module_tests/test_module_httpx.py	100% <100%> (ø)

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