fix(vector): separate write transport fields

harness/tht/adapters/vector/thoth_http.py

@@ -4,12 +4,11 @@ from tht.ports.vector import (
     VectorCapabilities,
     VectorHealth,
     VectorHit,
-    VectorRecord,
-    VectorStoreError,
+    VectorWriteRecord,
     VectorWriteUnavailable,
 )
 from tht.vectorstore.rest_client import VectorRestClient
-from tht.vectorstore.store import content_hash, hit_from_metadata
+from tht.vectorstore.store import hit_from_metadata
 
 
 def _merge(hits: list[VectorHit], limit: int) -> list[VectorHit]:
@@ -63,31 +62,26 @@ class ThothHttpVectorStore:
     def existing_hashes(self, collection: str, kinds: list[str]) -> dict[str, str]:
         return self._require_writer().existing_hashes(collection, kinds)
 
-    def upsert(self, collection: str, records: list[VectorRecord]) -> int:
+    def upsert(self, collection: str, records: list[VectorWriteRecord]) -> int:
         writer = self._require_writer()
         rows = [self._row(record) for record in records]
         return writer.upsert_records(collection, rows)
 
     @staticmethod
-    def _row(record: VectorRecord) -> dict:
-        extra = dict(record.metadata)
-        try:
-            embedding = extra.pop("embedding")
-        except KeyError as exc:
-            raise VectorStoreError(f"Vector record {record.id!r} has no embedding") from exc
-        digest = extra.pop("content_hash", content_hash(record.content))
+    def _row(write_record: VectorWriteRecord) -> dict:
+        record = write_record.record
         metadata = {
             "kind": record.kind,
             "ref": record.ref,
             "record_key": record.id,
             "title": record.title,
             "content": record.content,
-            **extra,
+            **record.metadata,
         }
         return {
             "record_key": record.id,
             "kind": record.kind,
-            "content_hash": digest,
+            "content_hash": write_record.content_hash,
             "metadata": metadata,
-            "embedding": embedding,
+            "embedding": write_record.embedding,
         }