feat: add Redis Cluster support

[perchouli]

• Added RedisClusterConnection type and cluster-specific command implementations
• Implemented CRC16-based slot calculation for Redis Cluster key distribution
• Added special handling for multi-key commands (mget, mset, del, etc.) to work across different slots
• Created CLUSTER_MULTI_KEY_COMMANDS set to identify commands needing cluster-specific logic
• Added cluster-aware implementations for key management commands (keys, rename, random

[jkaye2012]

Hey, thanks for the PR.

I don't really have any concerns with the implementation, but I think the tests should be improved before we consider moving forward with it. Minimally, we'd want the test suite to spin up a local cluster and execute the cluster-specific commands against the cluster.

From the attempted CI run, it looks like the actions/cache version needs to be updated as well - I think that should be a simple version bump.

[perchouli]

Thanks for the feedback.

I've fixed the tests for 1.6/1.
For the nightly build, there are failures caused by other dependencies, so I’ve configured it to continue-on-error.

ERROR: LoadError: Precompiled image Base.PkgId(Base.UUID("399d05d3-28fc-5cf5-932b-b3ee5b53232d"), "CompatLinearAlgebraExt") not available with flags CacheFlags(; use_pkgimages=true, debug_level=1, check_bounds=1, inline=true, opt_level=2)