feat(sdk): TSSDK-71 do not leak auth header in errors

[mk0x9]

handleRequestError in platform-sdk.ts attached the raw Axios error as originalError on thrown APIError/UnexpectedError instances. That error's config.headers carries the request's Authorization bearer token in plaintext, which leaks out through JSON.stringify/toJSON() or direct property access if a consumer logs or forwards the caught error to an error tracker.

• added redactAuthorizationHeader in errors.ts, called at the top of handleRequestError before the status-code switch;
• it overwrites config.headers.Authorization with a redacted placeholder when present;
• covered with a unit test in platform-sdk.test.ts asserting the token is redacted on the thrown error's originalError.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@            Coverage Diff             @@
##             main     #149      +/-   ##
==========================================
+ Coverage   97.26%   97.28%   +0.01%     
==========================================
  Files          14       14              
  Lines        1500     1511      +11     
  Branches      225      227       +2     
==========================================
+ Hits         1459     1470      +11     
  Misses         41       41              

Flag	Coverage Δ
unittests	97.28% <100.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
packages/sdk/src/errors.ts	95.74% <100.00%> (+1.15%)	⬆️
packages/sdk/src/platform-sdk.ts	98.86% <100.00%> (+<0.01%)	⬆️

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[sonarqubecloud]

Quality Gate failed

Failed conditions
0.0% Coverage on New Code (required ≥ 70%)

See analysis details on SonarQube Cloud