Add pipeline hash

[tarun-google]

Add Pipeline Hash along with the PipelineURL. This will allow the RunnerHarness/Server to check the sanity of pipeline while downloading

Tested=Manually with printing logs from Runner in all 3 langs(Java,Python, Go)

Golang-Model pb

Python-Pipeline pb

Java-Pipeline pb

GitHub Actions Tests Status (on master branch)

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[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a mechanism to verify the integrity of a pipeline during the download process by calculating and attaching a SHA256 hash of the serialized pipeline proto to the job options. This change ensures that the RunnerHarness or Server can validate the pipeline's sanity before execution, enhancing reliability across the Java, Python, and Go SDKs.

Highlights

• Pipeline Integrity: Added a SHA256 hash of the serialized pipeline proto to the pipeline options to ensure integrity during download.
• Cross-Language Support: Implemented the pipeline hash calculation and inclusion in Java, Go, and Python SDKs.
• Testing: Added unit tests in Go and Python to verify that the pipeline hash is correctly calculated and included in the job options.

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[gemini-code-assist]

Code Review

This pull request implements the generation and transmission of a SHA256 hash for the staged portable pipeline proto in the Java, Go, and Python Dataflow runners, adding it as a pipelineProtoHash option. Feedback for the Python implementation notes that re-serializing the pipeline proto to compute this hash can be resource-intensive and potentially non-deterministic; it is suggested to hash the actual bytes uploaded to GCS or allow the caller to provide a pre-computed hash.

[github-actions]

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[codecov]

Codecov Report

❌ Patch coverage is 81.81818% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.07%. Comparing base (9fdb366) to head (70464a9).
⚠️ Report is 10 commits behind head on master.

Files with missing lines	Patch %	Lines
...m/runners/dataflow/DataflowPipelineTranslator.java	60.00%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master   #38357   +/-   ##
=========================================
  Coverage     58.07%   58.07%           
+ Complexity    13024    13022    -2     
=========================================
  Files          2509     2509           
  Lines        262111   262110    -1     
  Branches      10612    10615    +3     
=========================================
+ Hits         152208   152224   +16     
+ Misses       104238   104218   -20     
- Partials       5665     5668    +3     

Flag	Coverage Δ
java	64.32% <71.42%> (+<0.01%)	⬆️
python	79.86% <100.00%> (+<0.01%)	⬆️

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