fix: use encoded addresses in refund params for events

[dandanlen]

Cherry pick of changes from #5135

[dandanlen]

Fixed compiler issues / clippy.

[codecov]

Codecov Report

Attention: Patch coverage is 65.21739% with 8 lines in your changes missing coverage. Please review.

Project coverage is 71%. Comparing base (a716d50) to head (0893760).
Report is 1 commits behind head on main.

Files	Patch %	Lines
api/lib/src/lib.rs	0%	5 Missing ⚠️
state-chain/pallets/cf-ingress-egress/src/lib.rs	33%	2 Missing ⚠️
state-chain/pallets/cf-swapping/src/lib.rs	75%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##            main   #5138    +/-   ##
======================================
- Coverage     71%     71%    -0%     
======================================
  Files        460     460            
  Lines      81919   81787   -132     
  Branches   81919   81787   -132     
======================================
- Hits       58422   58233   -189     
- Misses     20404   20461    +57     
  Partials    3093    3093            

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