chore: annotate RepresentationSaveError and assert truncate on re-embed

src/exceptions.py

@@ -137,8 +137,8 @@ class VectorStoreError(HonchoException):
 class RepresentationSaveError(HonchoException):
     """Raised when every observer's representation save fails in a batch."""
 
-    status_code = 500
-    detail = "Representation save failed for all observers"
+    status_code: int = 500
+    detail: str = "Representation save failed for all observers"
 
 
 class LLMError(Exception):

tests/deriver/test_vector_reconciliation.py

@@ -552,10 +552,11 @@ class TestReEmbedding:
         batch_call_count = 0
 
         async def track_batch_embed(
-            contents: list[str], **_kwargs: object
+            contents: list[str], *, on_oversize: str, **_kwargs: object
         ) -> list[list[float]]:
             nonlocal batch_call_count
             batch_call_count += 1
+            assert on_oversize == "truncate"
             return [[1.0] * 1536 for _ in contents]
 
         with patch("src.reconciler.sync_vectors.embedding_client") as mock_embed_client: