[PR] [Doc-16963] Document AWS credentials for Amazon EMR tasks [dolphinscheduler]

["richardmilles (via GitHub)" <gi...@apache.org>]

richardmilles opened a new pull request, #18470:
URL: https://github.com/apache/dolphinscheduler/pull/18470

   ## Was this PR generated or assisted by AI?
   
   YES. AI assistance was used for issue triage, drafting the EN/ZH documentation wording, and preparing this PR description. The content mirrors the existing AWS auth section in `emr-serverless.md` and was checked against the reported `UnrecognizedClientException` failure mode on #16963.
   
   ## Purpose of the pull request
   
   Fixes #16963 (documentation)
   
   Users hitting `The security token included in the request is invalid` / `UnrecognizedClientException` when using Amazon EMR (`ADD_JOB_FLOW_STEPS` / `RUN_JOB_FLOW`) had no guidance in classic `emr.md`. EMR Serverless docs already document Worker `conf/aws.yaml` `aws.emr` credentials; classic EMR docs did not.
   
   ## Brief change log
   
   - Add AWS Authentication Configuration to EN/ZH `emr.md`
   - Document IAM Role and Access Key setup under `aws.emr`
   - Call out the common invalid-token error and link EMR Serverless docs (shared config)
   
   ## Verify this pull request
   
   This pull request is documentation cleanup without runtime test coverage.
   
   - Compared against `emr-serverless.md` AWS auth section for consistency
   - EN + ZH pages updated together
   
   ## Pull Request Notice
   [Pull Request Notice](https://github.com/apache/dolphinscheduler/blob/dev/docs/docs/en/contribute/join/pull-request.md)


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Re: [PR] [Doc-16963] Document AWS credentials for Amazon EMR tasks [dolphinscheduler]

["SbloodyS (via GitHub)" <gi...@apache.org>]

SbloodyS closed pull request #18470: [Doc-16963] Document AWS credentials for Amazon EMR tasks
URL: https://github.com/apache/dolphinscheduler/pull/18470


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