allow zip to mismatch as long as it's within the same borough

[WillNilges]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 90.47619% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.94%. Comparing base (21088b5) to head (38c5af7).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
src/meshapi/views/forms.py	80.00%	1 Missing ⚠️
src/meshapi/zips.py	92.30%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #995      +/-   ##
==========================================
- Coverage   94.96%   94.94%   -0.03%     
==========================================
  Files          98       98              
  Lines        4309     4329      +20     
==========================================
+ Hits         4092     4110      +18     
- Misses        217      219       +2     

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