Records, vectors, payloads

A Record is id + vector + optional payload + optional document attachment + optional lineage.

notes.place(
    vector=[0.1] * 128,
    payload={"author": "ann", "kind": "design"},
)

• vector — fixed dimension per database; set at open(), immutable after
• payload — arbitrary dict-shaped metadata, JSON-compatible values
• id — UUIDv7 RecordID, auto-generated unless you pass one
• document, chunk, lineage — optional, populated by place_document()