feat: add container_registry_auth_id to create_pod

[janwinkler1]

• Adds container_registry_auth_id as an optional parameter to create_pod.
• When provided, it is passed as containerRegistryAuthId in the podFindAndDeployOnDemand GraphQL mutation, enabling pods to pull images from private container registries.
• Only applies to GPU pods.
• Previously the only workaround was to call run_graphql_query directly.
• Tested locally with UV_PYTHON=3.12 make setup && UV_PYTHON=3.12 make test

[promptless]

Promptless prepared a documentation update related to this change.

Triggered by runpod/runpod-python PR #506

Added a new "Use a private container registry" section documenting the containerRegistryAuthId parameter for pulling images from private registries when creating GPU Pods via the SDK.

Review: Document container_registry_auth_id for create_pod

[Copilot]

Pull request overview

Adds support for deploying GPU pods that can pull private container images by exposing a container_registry_auth_id option on the public create_pod API and threading it through to the podFindAndDeployOnDemand GraphQL mutation as containerRegistryAuthId.

Changes:

• Add container_registry_auth_id optional parameter to runpod.create_pod(...).
• Extend generate_pod_deployment_mutation(...) to include containerRegistryAuthId for GPU pods when provided.
• Add a unit test case asserting the new mutation field is present when requested and absent otherwise.

Reviewed changes

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

File	Description
tests/test_api/test_mutations_pods.py	Adds coverage for the new containerRegistryAuthId mutation field.
runpod/api/mutations/pods.py	Threads container_registry_auth_id into the GPU pod deployment mutation input.
runpod/api/ctl_commands.py	Exposes container_registry_auth_id on the public create_pod API and passes it into the mutation generator.

Comments suppressed due to low confidence (1)

tests/test_api/test_mutations_pods.py:50

• Same issue as above for the CPU mutation test: cloud_type="cloud" is not a supported value per the public API validation/documentation, and the mutation generator emits it as a GraphQL enum (unquoted). Update the test to use a valid enum value.

        # Test CPU pod deployment
        cpu_result = pods.generate_pod_deployment_mutation(
            name="test-cpu",
            image_name="test_image",
            cloud_type="cloud",

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