[EAGLE-6927] Update Dockerfile template to support multi architecture deployments

[wemoveon2]

Why

• Want to start building two images for amd and arm but want to reuse checkpoint layer between the two to optimize storage

How

• Separate checkpoint to architecture agnostic stage so downstream architecture specific stage can reuse instead of duplicating

Tests

• Existing tests using dockerfile template to build images pass

Notes

[Copilot]

Pull Request Overview

This PR refactors the Dockerfile template to use a multi-stage build pattern, separating model asset downloading from the final image creation to optimize build performance for multi-architecture builds.

• Introduces a new "model-assets" stage that runs architecture-agnostic operations once on the build node
• Moves checkpoint downloading and file copying to Stage 1 to avoid redundant work across target platforms
• Updates the final stage to copy pre-built assets from Stage 1 instead of re-executing build steps

[Copilot]

Pull Request Overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

[github-actions]

Package	Line Rate	Health
clarifai	45%	❌
clarifai.cli	44%	❌
clarifai.cli.templates	33%	❌
clarifai.client	67%	➖
clarifai.client.auth	67%	➖
clarifai.constants	100%	✔
clarifai.datasets	100%	✔
clarifai.datasets.export	80%	✔
clarifai.datasets.upload	75%	➖
clarifai.datasets.upload.loaders	37%	❌
clarifai.models	100%	✔
clarifai.modules	0%	❌
clarifai.rag	72%	➖
clarifai.runners	53%	➖
clarifai.runners.models	59%	➖
clarifai.runners.pipeline_steps	41%	❌
clarifai.runners.pipelines	70%	➖
clarifai.runners.utils	63%	➖
clarifai.runners.utils.data_types	72%	➖
clarifai.schema	100%	✔
clarifai.urls	60%	➖
clarifai.utils	60%	➖
clarifai.utils.evaluation	67%	➖
clarifai.workflows	95%	✔
Summary	62% (8217 / 13338)	➖

Minimum allowed line rate is 50%

[Copilot]

Copilot reviewed 1 out of 1 changed files in this pull request and generated 1 comment.