refactor: deprecate hf_models_to_cache

[deanq]

Works with runpod-workers/flash#32

[Copilot]

Pull Request Overview

This PR removes the deprecated hf_models_to_cache parameter from the remote execution framework. The parameter was previously used to specify HuggingFace model IDs for pre-caching but is being deprecated in favor of a new caching mechanism.

Key changes:

• Removed hf_models_to_cache parameter from all function signatures
• Updated test files to remove the deprecated parameter from test calls
• Cleaned up protocol buffer definitions and request structures

Reviewed Changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/unit/test_execute_class.py	Removed hf_models_to_cache parameter from all create_remote_class test calls
tests/unit/test_class_caching.py	Updated test calls to remove the deprecated parameter
tests/integration/test_class_execution_integration.py	Cleaned up integration tests by removing the parameter
src/tetra_rp/stubs/registry.py	Removed parameter from stub function signatures
src/tetra_rp/stubs/live_serverless.py	Removed parameter handling from serverless stub
src/tetra_rp/protos/remote_execution.py	Removed field definition from Pydantic model
src/tetra_rp/protos/remote_execution.proto	Removed field from protobuf definition
src/tetra_rp/execute_class.py	Removed parameter from create_remote_class function
src/tetra_rp/client.py	Removed parameter from remote decorator function

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