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   98.11%   98.12%           
=======================================
  Files          14       14           
  Lines        2285     2296   +11     
  Branches      294      296    +2     
=======================================
+ Hits         2242     2253   +11     
  Misses         41       41           
  Partials        2        2           

Flag	Coverage Δ
unittests	98.12% <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	99.32% <100.00%> (+<0.01%)	⬆️

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

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