Add fat_zebra payment processor

ENG-4633

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: horgh

CHANGELOG.md

@@ -6,8 +6,8 @@
   This is the token generated by the
   [Device Tracking Add-on](https://dev.maxmind.com/minfraud/track-devices)
   for explicit device linking.
-* Added the processors `:banquest`, `:summit_payments`, and `:yaadpay` to
-  `Minfraud::Components::Payment`.
+* Added the processors `:banquest`, `:fat_zebra`, `:summit_payments`, and
+  `:yaadpay` to `Minfraud::Components::Payment`.
 * Unnecessary files were removed from the published .gem.
 
 ## v2.9.0 (2025-11-20)

lib/minfraud/components/payment.rb

@@ -97,6 +97,7 @@ class Payment < Base
         epx
         eway
         exact
+        fat_zebra
         first_atlantic_commerce
         first_data
         fiserv