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Improve/gaps remediation - #26

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LutfiGarzon wants to merge 7 commits into
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improve/gaps-remediation
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LutfiGarzon wants to merge 7 commits into
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improve/gaps-remediation

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@LutfiGarzon

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- Replace STS AssumeRoleWithWebIdentity with unsigned REST call + XML parsing
- Replace KMS Decrypt with REST call + AWS SigV4 signing
- Extract shared SigV4 utility (providers/sigv4.ts)
- Convert sync command to use REST + SigV4 instead of KMSClient
- Remove @aws-sdk/client-sts and @aws-sdk/client-kms (~200 transitive deps)
- Zero runtime SDK dependencies — all clouds use native fetch

Tests: 189 passing, tsc clean
- SHA256 hash correctness
- Authorization header format validation (regex)
- Deterministic signatures for same inputs
- Different signatures for different bodies
- Security token inclusion/exclusion

195 tests passing
@LutfiGarzon
LutfiGarzon deleted the improve/gaps-remediation branch May 19, 2026 19:07
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