revert: use amd64-only docker builds instead of multi-arch

[adityachoudhari26]

Summary by CodeRabbit

• Chores
  • Updated build configuration to specify explicit platform targets for containerized services, improving build consistency and reliability across deployment pipelines.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

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📝 Walkthrough

Walkthrough

Six GitHub Actions workflow files are updated to explicitly specify the Docker build platform as linux/amd64 across all application and package builds. Each modification adds a single platform configuration parameter to the respective build steps.

Changes

Cohort / File(s)	Summary
Docker Build Platform Specification .github/workflows/apps-api.yaml, apps-relay.yaml, apps-web.yaml, apps-workspace-engine-router.yaml, apps-workspace-engine.yaml, packages-migrations.yaml	Added explicit platform: "linux/amd64" configuration to Docker image build steps across all workflows to standardize the target build platform.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 Six workflows aligned in perfect harmony,
Each Docker build now knows its destiny—
linux/amd64, a steadfast ground,
No more surprise builds spinning 'round! 🐳✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: adding platform constraints to Docker builds, converting from multi-architecture builds to amd64-only. This accurately summarizes the consistent modification across all six workflow files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch single-platform-only

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