Add LocalFeeder format validation and format fixture tests

[AadilLatif]

Summary

Ditto integration to for the LocalFeeder component

Type of Change

• Bug fix
• New feature
• Refactor
• Documentation update
• New component

Component Impact

List affected components:

Required Checks

• Linting passes
• Formatting checks pass
• Unit tests pass
• Integration tests pass (if applicable)

New Component Requirements

Complete this section if this PR adds a new component.

• Component directory follows existing structure and conventions in docs/component-structure.md
• component_definition.json is included and valid
• README.md is included and documents usage
• Dockerfile is included
• .gitmodules is updated for the new component submodule
• Unit test workflow added: .github/workflows/unit-test-<component>.yml
• Component verification workflow added: .github/workflows/verify-components-<component>.yml
• Dockerfile verification workflow added: .github/workflows/verify-dockerfiles-<component>.yml
• New wiring diagram added to scenarios/ (for example, <component>_system.json)
• Integration test added and uses the new wiring diagram in scenarios/
• Any required updates to root workflows are included and do not duplicate runs

Validation Evidence

Include command output or links to CI runs.

# Example commands
pytest -v

Checklist

• I updated documentation and badges as needed
• I confirmed CI workflows and file paths are correct
• I verified there are no unrelated changes in this PR