v0.1.2

Support AWS Credential key ID as API key

Allow AWS-signed requests to authenticate by extracting the Credential key ID from Authorization headers and treating it as the access key. Updates ApiKeyMiddleware (C#) to parse Authorization for `Credential=KEYID/...` when no X-Access-Key or accessKey query param is present, and updates the Next.js forwardHeaders to populate x-access-key from the same Credential value so downstream authentication can succeed. Existing validation (empty/length check) remains unchanged.