fix(server): Prevent a crash when grantIdentifier is not present in metadata

[nellh]

This field can be undefined and grantIdentifier.replace will fail with no property found.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 42.78%. Comparing base (b66b39e) to head (ef149d7).
⚠️ Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
...ro-server/src/graphql/resolvers/brainInitiative.ts	0.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3754      +/-   ##
==========================================
- Coverage   42.79%   42.78%   -0.01%     
==========================================
  Files         641      641              
  Lines       34430    34436       +6     
  Branches     1548     1548              
==========================================
  Hits        14735    14735              
- Misses      19556    19562       +6     
  Partials      139      139              

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