chore: simplify snapshot status display impl with derive_more

[LesnyRumcajs]

Summary of changes

Changes introduced in this pull request:

• it's the only occurrence I could find that's actually simplifying things.

Reference issue to close (if applicable)

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Other information and links

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation. All new code adheres to the team's documentation standards,
• I have added tests that prove my fix is effective or that my feature works (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes should be reflected in this document.

Summary by CodeRabbit

Release Notes

• New Features
  • Added a new synchronization state for scenarios where snapshot synchronization is not required
  • Enhanced snapshot synchronization status messages with improved clarity and visual indicators for initialization, in-progress, completion, and not-required states

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[coderabbitai]

Walkthrough

The SnapshotProgressState enum is refactored to use derive_more::Display instead of manual std::fmt::Display implementation. A new NotRequired variant is introduced, and all variants are annotated with explicit display formatting strings for consistent emoji-prefixed output.

Changes

Cohort / File(s)	Summary
SnapshotProgressState enum refactoring src/rpc/methods/sync/types.rs	Replace manual Display impl with derive_more::Display; add NotRequired variant with display annotation "⏳ Not Required (Snapshot is not needed)"; annotate existing variants (Initializing, InProgress, Completed) with emoji-prefixed display strings.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Suggested reviewers

• hanabi1224
• akaladarshi

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: simplifying snapshot status display implementation using derive_more crate, which aligns perfectly with the code modifications.

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✨ Finishing touches

• 📝 Generate docstrings

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