Drop hard dependency on redis-py; test on Valkey too

[akx]

Stacked on top of #41.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 98.03922% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 92.00%. Comparing base (d4d9b9d) to head (f2295c5).

Files with missing lines	Patch %	Lines
minique/types.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #42      +/-   ##
==========================================
+ Coverage   90.58%   92.00%   +1.41%     
==========================================
  Files          27       27              
  Lines        1041     1050       +9     
  Branches       80       80              
==========================================
+ Hits          943      966      +23     
+ Misses         65       53      -12     
+ Partials       33       31       -2     

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[Copilot]

Pull Request Overview

This PR removes the hard dependency on redis-py by making it an optional dependency, while adding support for Valkey as an alternative Redis-compatible client. The changes enable users to choose between redis-py or valkey-py clients.

Key changes:

• Converts redis dependency from required to optional with separate [redis] and [valkey] extras
• Introduces generic RedisClient type alias to support both client libraries
• Updates CLI to auto-detect and prefer Valkey client when available
• Adds comprehensive test coverage for both Redis and Valkey client/server combinations

Reviewed Changes

Copilot reviewed 19 out of 19 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pyproject.toml	Moves redis dependency to optional extras, adds valkey option
minique/types.py	Defines RedisClient type alias for client abstraction
minique/cli.py	Implements client auto-detection logic with Valkey preference
minique_tests/conftest.py	Updates test fixture to use new client detection
minique/work/job_runner.py	Replaces isinstance check with duck typing
.github/workflows/ci.yml	Adds matrix testing for Redis/Valkey client/server combinations
README.md	Updates documentation to reflect Redis/Valkey support
Various test files	Updates type annotations from Redis to RedisClient

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[ruksi]

valkey support, yay

[ruksi]

the branch protection rules had old CI actions, change to the following based on that the old ones were 3.10 and 3.13

edit as needed!