Add option to not re-index (#4157)

* Add option to not re-index

* Add quantizaton / dimensionality override support

* Fix build / ut

backend/onyx/document_index/interfaces.py

@@ -6,6 +6,7 @@ from typing import Any
 from onyx.access.models import DocumentAccess
 from onyx.context.search.models import IndexFilters
 from onyx.context.search.models import InferenceChunkUncleaned
+from onyx.db.enums import EmbeddingPrecision
 from onyx.indexing.models import DocMetadataAwareIndexChunk
 from shared_configs.model_server_models import Embedding
 
@@ -145,17 +146,21 @@ class Verifiable(abc.ABC):
     @abc.abstractmethod
     def ensure_indices_exist(
         self,
-        index_embedding_dim: int,
+        primary_embedding_dim: int,
+        primary_embedding_precision: EmbeddingPrecision,
         secondary_index_embedding_dim: int | None,
+        secondary_index_embedding_precision: EmbeddingPrecision | None,
     ) -> None:
         """
         Verify that the document index exists and is consistent with the expectations in the code.
 
         Parameters:
-        - index_embedding_dim: Vector dimensionality for the vector similarity part of the search
+        - primary_embedding_dim: Vector dimensionality for the vector similarity part of the search
+        - primary_embedding_precision: Precision of the vector similarity part of the search
         - secondary_index_embedding_dim: Vector dimensionality of the secondary index being built
                 behind the scenes. The secondary index should only be built when switching
                 embedding models therefore this dim should be different from the primary index.
+        - secondary_index_embedding_precision: Precision of the vector similarity part of the secondary index
         """
         raise NotImplementedError
 
@@ -164,6 +169,7 @@ class Verifiable(abc.ABC):
     def register_multitenant_indices(
         indices: list[str],
         embedding_dims: list[int],
+        embedding_precisions: list[EmbeddingPrecision],
     ) -> None:
         """
         Register multitenant indices with the document index.