Update database schema to include solid_cache_entries table

[rsmoke]

• Incremented schema version to 2026_01_20_175200.
• Added a new table solid_cache_entries with fields for byte size, key, key hash, and value, along with relevant indexes for optimized querying.

This commit enhances the database structure to support solid cache functionality, improving caching performance and efficiency.

Pull Request

Description

Related Issues

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• 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
• I have checked my code and corrected any misspellings