v3.0.0-rc.8

What's Changed

• docs: show expires = true with Result and Option returns in expires_per_key example by @jaemk in #269
• chore: update hashbrown to 0.17, criterion to 0.8, googletest to 0.14 by @jaemk in #270
• redb DiskCache backend and API cleanups (staged for next major) by @jaemk in #271
• feat: macros, stores/traits, redis TLS split, runtime decoupling, constructor and ttl consistency by @jaemk in #272
• release: 3.0.0-rc.1 by @jaemk in #273
• v3 API changes, security hardening, and macro guards by @jaemk in #274
• 3.0 pre-release fixes: sync_writes revert, redis feature axes, CachedGetOrSetAsync by @jaemk in #276
• 3.0.0-rc.3: freeze the v3 API, behavior and docs fixes, test/CI hardening by @jaemk in #277
• 3.0.0-rc.4: rc.3 review fixes (behavior, packaging, docs) by @jaemk in #278
• 3.0.0-rc.5: v3 review fixes (behavior, breaking API, docs, specs) by @jaemk in #279
• restructure specs into a feature inventory by @jaemk in #280
• 3.0.0-rc.6: pre-release review fixes (behavior, api, docs) by @jaemk in #281
• test: widen the async redb eviction race ttl to match the sync test by @jaemk in #282
• 3.0.0-rc.7: pre-release review fixes (redis prefix guard, redb dir self-heal, docs, example CI) by @jaemk in #283
• reject inert sync_writes_buckets, drop expiring-store struct bounds, derive ConnectionString eq, store format and doc fixes by @jaemk in #284
• feat: add runtime set_max_size to sharded LRU stores, rename RedbCacheBuilder::disk_dir, add resilience example by @jaemk in #285
• Trait-only sharded ttl controls, per-shard initial capacity, ExpiringLruCache::retain, docs and spec fixes by @jaemk in #286
• rename SetMaxSizeError::ZeroSize to ZeroMaxSize, document redis/redb format stability, correct spec drift by @jaemk in #287
• fix: Acquire load for sharded metrics().capacity, document concurrent set_max_size semantics, sync specs by @jaemk in #288
• release: 3.0.0-rc.8 by @jaemk in #289

Full Changelog: v2.0.2...v3.0.0-rc.8