feat: add identity and business verification trigger

[cursor]

Fixes

Adds triggerIdentityOrBusinessVerification for the dedicated POST /v1/verifications/trigger endpoint, including typed request and compact response contracts. The existing type-in-path trigger remains unchanged.

Documentation: trolley/developer-documentation#221

Checklist

• I acknowledge that all my contributions will be made under the project's license
• I have made a material change to the repo (functionality, testing, spelling, grammar)
• I have titled the PR appropriately
• I have updated my branch with the main branch
• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary documentation about the functionality in the appropriate .md file
• I have added inline documentation to the code I modified

Validation: npm test (44 passing) and npm run build.

  

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.02%. Comparing base (ffd0770) to head (0763e3e).

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #78      +/-   ##
==========================================
+ Coverage   67.96%   68.02%   +0.06%     
==========================================
  Files          26       26              
  Lines        2544     2549       +5     
  Branches       83       19      -64     
==========================================
+ Hits         1729     1734       +5     
  Misses        815      815              

Files with missing lines	Coverage Δ
lib/VerificationGateway.ts	100.00% <100.00%> (ø)

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