Ensure contribution router target is a contract

[arr00]

Link T-4348

[height]

This pull request has been linked to 1 task:

• T-4348 Contribution Router Fails when data appended (mint.fun) (unlink task)

💡Tip: Add "Close T-4348" to the pull request title or description, to a commit message, or in a comment to mark this task as "Done" when the pull request is merged.

[github-actions]

Gas Report:
Accept Proposal: 31749
Create party custom metadata: 726170
Create party vanilla: 296856
Contribute to ETH party: 204946
Batch contribute two memberships to ETH party: 278352
Create proposal transfer eth: 141169
Execute proposal transfer eth: 123058
Create proposal distribute: 139523
Execute proposal distribute: 227375
Claim distribution: 71963

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8245386) 66.70% compared to head (6bbc004) 66.74%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #374      +/-   ##
==========================================
+ Coverage   66.70%   66.74%   +0.04%     
==========================================
  Files          69       69              
  Lines        2946     2950       +4     
  Branches      644      645       +1     
==========================================
+ Hits         1965     1969       +4     
  Misses        783      783              
  Partials      198      198              

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