[CLEAN] Synthetic Benchmark PR #29873 - feat(tests): add comprehensive tests for Processing and EmbeddingProcess components

[tomerqodo]

Benchmark PR langgenius#29873

Type: Clean (correct implementation)

Original PR Title: feat(tests): add comprehensive tests for Processing and EmbeddingProcess components
Original PR Description: feat(tests): add comprehensive tests for Processing and EmbeddingProcess components

• Introduced new test files for Processing and EmbeddingProcess components, covering rendering, props variations, edge cases, and memoization.
• Added mock implementations for external dependencies to facilitate testing.
• Enhanced Jest configuration to handle module resolution for lodash and ky.
• Created a mock for the ky HTTP client to avoid ESM issues in Jest tests.
• Updated Processing component to handle optional chaining for retrieval method.

This commit significantly improves test coverage and stability for the document processing features.

Original PR URL: langgenius#29873