fix: error back in

Author: TheGreatAlgo

py_hamt/store_httpx.py

@@ -390,6 +390,7 @@ async def save(self, data: bytes, codec: ContentAddressedStore.CodecInput) -> CI
                 except httpx.HTTPStatusError:
                     # Re-raise non-timeout HTTP errors immediately
                     raise
+        raise RuntimeError("Exited the retry loop unexpectedly.")  # pragma: no cover
 
     async def load(self, id: IPLDKind) -> bytes:
         cid = cast(CID, id)
@@ -425,3 +426,4 @@ async def load(self, id: IPLDKind) -> bytes:
                 except httpx.HTTPStatusError:
                     # Re-raise non-timeout HTTP errors immediately
                     raise
+        raise RuntimeError("Exited the retry loop unexpectedly.")  # pragma: no cover