chore(deps): update valkey/valkey docker tag to v9.1.0

[renovate]

This PR contains the following updates:

Package	Update	Change
valkey/valkey	minor	9.0.4-alpine → 9.1.0-alpine

---

Release Notes

valkey-io/valkey (valkey/valkey)

v9.1.0

Compare Source

Upgrade urgency LOW: This is the first stable release of Valkey 9.1.

Security fixes

• (CVE-2026-23479) Use-After-Free in unblock client flow
• (CVE-2026-25243) Invalid Memory Access in RESTORE command
• (CVE-2026-23631) Use-after-free when full sync occurs during a yielding Lua/function execution

New Features and enhanced behavior

• Add cluster bus network traffic usage metric in bytes by @​hpatro (#​3396)
• Reduce latency spikes during rehashing via incremental page release by @​chzhoo (#​3481)

Bug Fixes

• Fix(syncio): Set errno on EOF in syncRead and propagate to conn->last by @​abmathur-ie (#​3580)
• Fix GEOSEARCH BYPOLYGON leak on invalid COUNT by @​bandalgomsu (#​3568)
• Handle NULL pointer in streamTrim listpack delta calculation by @​smkher (#​3591)
• Fixes server crash when RDMA benchmark clients disconnect by @​quanyeyang (#​3448)
• Fix the memory leak in valkey-benchmark by @​nmvk (#​3643)

---

Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.