chore: simplify, modernize (Go 1.26), update deps

[rustatian]

Bug fixes

• kv/driver.go:74 — MinRetryBackoff was set to MaxRetryBackoff (copy-paste); min always equalled max
• kv/tlsconfig.go:41 — AppendCertsFromPEM failure returned nil, nil (silent empty pool); now returns a real error
• kv/tlsconfig.go:48 — os.Stat(conf.RootCa) ran unconditionally outside the RootCa != "" guard; cert/key-only TLS always failed; moved inside the block
• kv/driver.go:286 — Expire result discarded in MExpire; errors silently lost
• kv/driver.go — keys == nil guards replaced with len(keys) == 0 (Has, MGet, Set, Delete, TTL)
• kv/driver.go:334 — Clear called FlushDB().Err() twice; simplified to a single call

Simplify / modernise

• kv/tlsconfig.go — removed dead TLS 1.3 CipherSuites block (Go ignores CipherSuites for 1.3 since Go 1.17); dropped golang.org/x/sys/cpu direct dependency
• config.go — removed dead root-package Config/InitDefaults (actual config lives in kv.Config and is never read from the root package)

Deps

• go mod tidy; golang.org/x/sys demoted to indirect (no longer directly imported)

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 223ea777-bf8d-4ab3-aa53-cebfc8179152

📥 Commits

Reviewing files that changed from the base of the PR and between 4125fa2 and 9df7b82.

⛔ Files ignored due to path filters (3)

• go.sum is excluded by !**/*.sum
• go.work.sum is excluded by !**/*.sum
• tests/go.sum is excluded by !**/*.sum

📒 Files selected for processing (5)

• config.go
• go.mod
• kv/driver.go
• kv/tlsconfig.go
• tests/go.mod

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• Create PR with unit tests
• Commit unit tests in branch chore/cleanup-modernize-deps

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[Copilot]

Pull request overview

This PR modernizes the Redis KV plugin by fixing several Redis driver/TLS bugs, simplifying dead TLS cipher-suite logic, and tidying module checksums/dependency classification.

Changes:

• Fixes Redis driver behavior for retry backoff, empty variadic inputs, MExpire error propagation, and Clear error handling.
• Simplifies TLS configuration and returns a real error when CA PEM parsing fails.
• Removes root-package config code and updates Go module sums/dependency metadata.

Reviewed changes

Copilot reviewed 5 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
kv/driver.go	Fixes Redis option wiring and error handling in KV operations.
kv/tlsconfig.go	Simplifies TLS defaults and improves root CA parse error handling.
config.go	Deletes the root-package exported config type/defaults.
go.mod	Moves golang.org/x/sys to indirect dependencies.
go.sum	Adds tidy-generated checksum entry.
tests/go.sum	Adds tidy-generated checksum entry for tests module.
go.work.sum	Updates workspace checksum metadata.

Comments suppressed due to low confidence (1)

config.go:1

• Removing the exported root-package Config type is a breaking API change for consumers that import github.com/roadrunner-server/redis/v6 and reference redis.Config, even if this package no longer uses it internally. Keep the compatibility type (or defer removal to a major-version change) so external users do not get compile-time failures from this cleanup.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.48%. Comparing base (4125fa2) to head (9df7b82).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #213      +/-   ##
==========================================
+ Coverage   73.33%   81.48%   +8.14%     
==========================================
  Files           2        1       -1     
  Lines          30       27       -3     
==========================================
  Hits           22       22              
+ Misses          6        3       -3     
  Partials        2        2              

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