Bump dalli from 3.2.8 to 4.3.0

[dependabot]

Bumps dalli from 3.2.8 to 4.3.0.

Changelog

Sourced from dalli's changelog.

4.3.0

New Features:

• Add namespace_separator option to customize the separator between namespace and key (#1019)
  • Default is : for backward compatibility
  • Must be a single non-alphanumeric character (e.g., :, /, |, .)
  • Example: Dalli::Client.new(servers, namespace: 'myapp', namespace_separator: '/')

Bug Fixes:

• Fix architecture-dependent struct timeval packing for socket timeouts (#1034)

  • Detects correct pack format for time_t and suseconds_t on each platform
  • Fixes timeout issues on architectures with 64-bit time_t

• Fix get_multi hanging with large key counts (#776, #941)

  • Add interleaved read/write for pipelined gets to prevent socket buffer deadlock
  • For batches over 10,000 keys per server, requests are now sent in chunks

• Breaking: Enforce string-only values in raw mode (#1022)

  • set(key, nil, raw: true) now raises MarshalError instead of storing ""
  • set(key, 123, raw: true) now raises MarshalError instead of storing "123"
  • This matches the behavior of client-level raw: true mode
  • To store counters, use string values: set('counter', '0', raw: true)

CI:

• Add TruffleRuby to CI test matrix (#988)

4.2.0

Performance:

• Buffered I/O: Use socket.sync = false with explicit flush to reduce syscalls for pipelined operations
• get_multi optimizations: Use Set for O(1) server tracking lookups
• Raw mode optimization: Skip bitflags request in meta protocol when in raw mode (saves 2 bytes per request)

New Features:

• OpenTelemetry tracing support: Automatically instruments operations when OpenTelemetry SDK is present
  • Zero overhead when OpenTelemetry is not loaded
  • Traces get, set, delete, get_multi, set_multi, delete_multi, get_with_metadata, and fetch_with_lock
  • Spans include db.system: memcached and db.operation attributes
  • Single-key operations include server.address attribute
  • Multi-key operations include db.memcached.key_count attribute
  • get_multi spans include db.memcached.hit_count and db.memcached.miss_count for cache efficiency metrics
  • Exceptions are automatically recorded on spans with error status

... (truncated)

Commits

• c5d0dd4 Merge pull request #1063 from petergoldstein/feature/v4.3.0-bugfixes
• 91bee8c Bump version to 4.3.0
• dfcb8ec Run benchmarks only on main branch merges
• 0f55391 Add concurrency settings to all GitHub Actions workflows
• 9f4cb5f Add TruffleRuby CI to changelog
• 494cabc Add TruffleRuby in CI
• 2234c2f Exclude timeout test as it fails transiently on non-CRuby
• 42c8f1a Fix JRuby thread interrupt handling in pipelined get
• 3ef4394 Enforce string-only values in raw mode (#1022)
• bf2fbb3 Fix get_multi hanging with large key counts (#776, #941)
• Additional commits viewable in compare view

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