fix:removed empty keys in state storage and fixed instant finality & …

[Kartik213]

Description

• Removed empty keys in state storage
• Added state.load in fuzzer target to load correct state based on header hash
• Added transform method on state to convert it to dictionary

Type of Change

• feat: New feature
• fix: Bug fix
• refactor: Code change that neither fixes a bug nor adds a feature
• perf: Code change that improves performance
• test: Adding missing tests or correcting existing tests

Related Issues

Fixes #[issue number]

Checklist

• Unit/Integration/Manual tests performed
• My code follows the project style guidelines ()
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have updated the documentation accordingly
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

Additional Notes

[Add any additional information that would help reviewers]