refactor(memory): own solved-question lifecycle (#24)

harness/tests/test_adapter_command_regressions.py

@@ -93,20 +93,19 @@ def test_solved_index_writes_through_writer_only_factory_store(monkeypatch):
     )
     cfg = SimpleNamespace(embeddings=object(), vector_write_rest=object())
     manifest = SimpleNamespace(id="s1")
-    solved_record = object()
+    snapshot = SimpleNamespace(manifest=manifest, decisions=[], artifacts={})
     calls = []
 
-    monkeypatch.setattr(memory_cmd, "load_snapshot_or_exit", lambda cfg, session: SimpleNamespace(manifest=manifest, decisions=[], artifacts={}))
+    monkeypatch.setattr(memory_cmd, "load_snapshot_or_exit", lambda cfg, session: snapshot)
     monkeypatch.setattr(
         "tht.adapters.factory.build_vector_store",
         lambda cfg, require_write: calls.append(require_write) or writer_only_store,
     )
     monkeypatch.setattr("tht.cli.sql_cmd.promoted_tables_for", lambda *args: [])
-    monkeypatch.setattr("tht.solved.build_solved_snapshot", lambda *args: solved_record)
     monkeypatch.setattr(
-        "tht.solved.save_solved_question",
-        lambda record, *, store, embedder: int(
-            record is solved_record and store is writer_only_store
+        "tht.memory.index_solved_question",
+        lambda loaded, tables, *, store, embedder: int(
+            loaded is snapshot and tables == [] and store is writer_only_store
         ),
     )
     monkeypatch.setattr("tht.cli.vector_cmd.make_embedder", lambda cfg: object())