Bump dalli from 3.2.8 to 5.0.2

[dependabot]

Bumps dalli from 3.2.8 to 5.0.2.

Changelog

Sourced from dalli's changelog.

5.0.2

Performance:

• Add single-server fast path for get_multi, set_multi, and delete_multi (#1077)
  • When only one memcached server is configured, bypass the Pipelined* machinery (IO.select, response buffering, server grouping) and issue all quiet meta requests inline followed by a noop terminator
  • get_multi shows ~1.5x improvement at 10 keys and ~1.75x at 100–500 keys compared to the PipelinedGetter path
  • Thanks to Dan Mayer (Shopify) for this contribution

Development:

• Add bin/benchmark_branch script for benchmarking against the current branch

5.0.1

Performance:

• Reduce object allocations in pipelined get response processing (#1072, #1078)
  • Offset-based ResponseBuffer: track a read offset instead of slicing a new string after every parsed response; compact only when the consumed portion exceeds 4KB and more than half the buffer
  • Inline response processor parsing: avoid intermediate array allocations from split-based header parsing
  • Block-based pipeline_next_responses: yield (key, value, cas) directly when a block is given, avoiding per-call Hash allocation
  • PipelinedGetter: replace Hash-based socket-to-server mapping with linear scan (faster for typical 1-5 server counts); use Process.clock_gettime(CLOCK_MONOTONIC) instead of Time.now
• Add cross-version benchmark script (bin/compare_versions) for reproducible performance comparisons across Dalli versions

Bug Fixes:

• Rescue IOError in connection manager write/flush methods (#1075)
  • Prevents unhandled exceptions when a connection is closed mid-operation
  • Thanks to Graham Cooper (Shopify) for this fix

Development:

• Add rubocop-thread_safety for detecting thread-safety issues (#1076)
• Add CONTRIBUTING.md with AI contribution policy (#1074)

5.0.0

Breaking Changes:

• Removed binary protocol - The meta protocol is now the only supported protocol

  • The :protocol option is no longer used
  • Requires memcached 1.6+ (for meta protocol support)
  • Users on older memcached versions must upgrade or stay on Dalli 4.x

• Removed SASL authentication - The meta protocol does not support authentication

  • Use network-level security (firewall rules, VPN) or memcached's TLS support instead
  • Users requiring SASL authentication must stay on Dalli 4.x with binary protocol

... (truncated)

Commits

• d93d9da Merge pull request #1083 from petergoldstein/release/5.0.2
• f73d29a Bump version to 5.0.2 and update CHANGELOG
• 3c45c42 Merge pull request #1077 from danmayer/single-server-get-multi-fast-path
• 623dac9 Merge pull request #1082 from petergoldstein/add-claude-github-actions-177179...
• 86caa3c "Update Claude Code Review workflow"
• 27b5f0d "Update Claude PR Assistant workflow"
• d0fd3d1 Add single-server fast path for set_multi and delete_multi
• a85e041 Merge pull request #1080 from petergoldstein/add-claude-github-actions-177171...
• 7a7dff4 "Claude Code Review workflow"
• de9d5bb "Claude PR Assistant workflow"
• Additional commits viewable in compare view

Note
Automatic rebases have been disabled on this pull request as it has been open for over 30 days.

[larouxn]

This should be a nice upgrade performance wise. However Dalli 5 contains changes that makes it a requirement to be on memcached 1.6+. @colby-swandale, any idea what version of memchached we're using?