Feat: Add Redis governance provider

[rian-be]

Summary

This PR implements the ModularityKit.Mutator.Governance.Redis provider from scratch, bringing fully functioning, Redis backed governance storage implementation to ecosystem. It also includes comprehensive documentation and runnable examples.

Added

• complete Redis governance provider implementation
• centralized Redis keyspace conventions and serialization strategy
• document and identifier set loading for efficient read side operations
• candidate selection and execution for distributed orchestration
• write side request persistence mechanism
• dedicated package README for ModularityKit.Mutator.Governance.Redis
• RedisQueries runnable example demonstrating Redis backed governance queries
• docker-compose.yml for local Redis testing in the examples

Result

The repository now provides fully implemented, Redis backed governance provider. It correctly documents its capabilities, provides runnable example for query workflows using Redis, and has accurate package descriptions in the root overview. The new package is fully implemented, closing out all underlying provider tasks.

Testing

• verified local build
• verified RedisQueries example runs with local Redis container

Linked Issues

• Closes [Task]: Add Redis governance query read orchestration #38
• Closes [Task]: Add Redis governance identifier set loading #37
• Closes [Task]: Add Redis governance request persistence #36
• Closes [Task]: Add Redis governance document loading #35
• Closes [Task]: Add Redis governance query candidate selection #34
• Closes [Task]: Define Redis governance serialization strategy #33
• Closes [Task]: Centralize Redis governance keyspace conventions #32
• Closes [Task]: Add ModularityKit.Mutator.Governance.Redis provider #31
• Closes [Task]: Add governance query store contracts #20
• Closes [Task]: Add governance request query API #8

Checklist

• Redis provider features are implemented
• Redis package has dedicated package README
• Redis governance queries example is provided
• Root README correctly describes all packages