v0.4.2
Updated messages
Combined sampling table and performing k-means phases
Increased max dimensions for vector from 1024 to 16000 and increased max dimensions for index from 1024 to 2000
Use memory context for inserts
Added VectorArrayFree
Use DatumGetVector
Restored previous behavior and added comment
Added dimensions check to vector_avg
Fixed compilation with Postgres 16 - fixes #61