Implement Redis cache with unit tests

[ohhmm]

Consider boost::redis

[ohhmm]

Use boost::redis

[devin-ai-integration]

API Mismatch: The RedisCache implementation doesn't match the CacheBase interface. The base class requires:

virtual std::string GetOne(const std::string_view& key) = 0;
virtual bool Set(const std::string_view& key, const std::string_view& v) = 0;
virtual bool Clear(const std::string_view& key) = 0;

But RedisCache implements:

bool Set(const std::string& key, const std::string& value) override;
bool Get(const std::string& key, std::string& value) override;
bool Clear() override;

Needs to be updated to match the base class interface with proper parameter types (std::string_view) and method signatures.

[devin-ai-integration]

Namespace and Directory Structure Issue: The PR adds files to omnn/rt/storage/ but the existing CacheBase is in omnn/storage/. This creates inconsistency in the codebase structure. Either:

1. Move the RedisCache implementation to omnn/storage/ to match existing cache implementations, or
2. Move all cache implementations to omnn/rt/storage/ for consistency

Also, the include path in RedisCache.h (#include "CacheBase.h") won't work since it's looking in the wrong directory.

[devin-ai-integration]

PR Description Suggestion: The PR description mentions "Consider boost::redis" but the implementation uses hiredis instead. The boost::redis library might be a better fit for this codebase since:

1. It's more C++ idiomatic with modern C++ features
2. The project already uses Boost extensively
3. It would eliminate the need for manual connection management and C-style API calls

Consider evaluating boost::redis as mentioned in the PR description for a more integrated solution.