fix: flush all native providers on shutdown to prevent data loss

Shutdown/close/flush now properly flushes all 4 components in parallel:
metadataIndex, graphIndex, HNSW dirty nodes, and storage counts. Previously
only counts were flushed, causing native provider data loss on restart.

Also:
- Wire roaring, msgpack, entityIdMapper provider consumption from plugins
- Fix allOf filter O(n²) intersection → O(n) Set-based
- Fix ne/exists negation filter to use Set-based exclusion
- Add setMsgpackImplementation() swap in SSTable for native msgpack
- Add setRoaringImplementation() swap for native CRoaring bitmaps
- Add getAllIntIds() to EntityIdMapper for bitmap operations
- Remove TypeAwareHNSWIndex from default index creation path
- Export memory detection utilities from internals
- Clean up 26 permanently-skipped dead tests

src/internals.ts

@@ -9,3 +9,5 @@ export { FieldTypeInference, FieldType } from './utils/fieldTypeInference.js'
 export type { FieldTypeInfo } from './utils/fieldTypeInference.js'
 export { EntityIdMapper } from './utils/entityIdMapper.js'
 export type { EntityIdMapperOptions, EntityIdMapperData } from './utils/entityIdMapper.js'
+export { getRecommendedCacheConfig, formatBytes, checkMemoryPressure } from './utils/memoryDetection.js'
+export type { MemoryInfo, CacheAllocationStrategy } from './utils/memoryDetection.js'