fix: redis SSL kwargs incompatible with redis-py 7.x

[aron-muon]

Summary

Fixes AbstractConnection.__init__() got an unexpected keyword argument 'ssl_context' crash on startup introduced in #54.

The previous change replaced individual ssl_* kwargs with a single ssl_context object, but redis-py 7.x's SSLConnection does not accept ssl_context — it expects individual parameters (ssl_ca_certs, ssl_certfile, etc.).

Closes #53 (remaining fix from #54)

Changes

src/config/redis.py

• Removed _build_ssl_context() and the import ssl it required (which also shadowed the ssl field name)
• get_ssl_kwargs() now returns individual ssl_* parameters compatible with redis-py 7.x
• Key fix: None-valued params (ssl_ca_certs, ssl_certfile, ssl_keyfile) are now omitted rather than passed explicitly, so unset fields fall back to redis-py defaults (e.g. system CA bundle) instead of overriding them

tests/unit/test_redis_config.py

• Rewrote SSL tests to verify the actual kwargs shape (individual params, not ssl_context)
• Added test_ssl_kwargs_accepted_by_connection_pool which creates a real redis.ConnectionPool.from_url() with the spread kwargs — this would have caught the original bug
• Added tests for None-omission behavior (test_ssl_omits_none_ca_certs, test_ssl_omits_none_certfile)

Test plan

• All 1332 unit tests pass (just test-unit)
• Linter passes (just lint)
• test_ssl_kwargs_accepted_by_connection_pool validates kwargs against real redis-py API
• Deploy with Redis TLS + custom CA cert

🤖 Generated with Claude Code

[github-actions]

🎉 This PR is included in version 3.3.2 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀