store_entity drops entities on two error paths; load_entity can leave the page cache enabled

[LukasGold]

Two pre-existing gaps in src/osw/core.py, found while working on #175. Neither is caused by that issue or its fix.

1. store_entity_ drops an entity on two error paths

store_entity_, the worker inside OSW.store_entity, logs an error and returns on two conditions:

• src/osw/core.py:1856-1863 - get_title(entity_) raises
• src/osw/core.py:1866-1875 - namespace_ or title_ is None

A plain return is not an exception. handle_upload_object_ therefore returns normally, results receives None for that entity, and the collector loop at src/osw/core.py:2048-2052 adds nothing to failed. The entity reaches neither StoreEntityResult.pages nor StoreEntityResult.failed.

Consequences:

• store_entity does not raise StoreEntityPartialError, so the caller sees a successful call
• len(result.pages) is smaller than the number of entities passed in, with no indication why
• only the log records the failure

The third error condition in the same function, raise TypeError(...) at src/osw/core.py:1877, behaves correctly: it propagates and the collector loop records it in failed.

Expected

Both conditions raise, so the entity is reported in StoreEntityResult.failed like every other failure.

2. load_entity does not restore the page cache state when a call raises

OSW.load_entity saves the cache state at src/osw/core.py:1223, changes it at src/osw/core.py:1225 and src/osw/core.py:1228, and restores it at src/osw/core.py:1312-1316. The restore is not in a finally block.

Calls between the two points that can raise and are not caught:

• src/osw/core.py:1231 - self.site.get_page(...)
• src/osw/core.py:1238 - page.get_slot_content("jsondata")
• src/osw/core.py:1244-1252 - fetching each referenced category schema
• src/osw/core.py:1261-1267 - self.fetch_schema(...)
• src/osw/core.py:1301-1309 - namespace_from_full_title / title_from_full_title

If any of these raises, the cache stays in the state set for the duration of the load. A caller that had the cache disabled then keeps it enabled for the rest of the process. That is the same failure mode as #176, where a later get_page can return a revision from before the write.

Expected

The restore runs in a finally block.

Note

_fetch_schema has the same unprotected pattern at src/osw/core.py:599-600 and src/osw/core.py:1061. That one is already fixed in #180 and is not part of this issue.