Draft: fix failing pipeline

Summary

The pipeline was failing because a new association :supply_chain_attestation was added to the Ci::Build model but was not included in the test's list of known accessors. The test Ci::CloneJobService#execute validates that all model attributes and associations are explicitly categorized, causing it to fail when encountering an unknown accessor.

Changes

• File: spec/services/ci/clone_job_service_spec.rb
• Added :supply_chain_attestation to the reject_accessors array (line 79)
• This categorizes the new association as an attribute that should NOT be copied when cloning a job
• Rationale: Supply chain attestations are generated artifacts specific to each job execution and should be regenerated fresh for cloned/retried jobs, consistent with how other job artifacts are handled

Verification

• ✅ Ruby syntax validation passed: ruby -c spec/services/ci/clone_job_service_spec.rb returned "Syntax OK"
• ✅ The change is minimal and focused on the specific issue
• ✅ No CI/CD configuration files were modified (as expected per the context)
• ✅ The association exists in the model: app/models/ci/build.rb line 134
• ✅ The failing test should now pass because all current accessors of Ci::Build are accounted for in the known accessors list

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Fixes failing pipeline on !211092

Session 1383894