fix: harden preprocessing state and child capabilities

harness/tests/test_qdrant_cli_commands.py

@@ -5,12 +5,21 @@ from datetime import UTC, datetime
 from pathlib import Path
 from types import SimpleNamespace
 
+import pytest
 from typer.testing import CliRunner
 
 from tht.cli import app
 from tht.memory import MemoryRecord, save_registry
 
 
+@pytest.fixture(autouse=True)
+def _child_capability_for_vector_unit_tests(monkeypatch):
+    import tht.cli.preprocess_cmd as preprocess
+    import tht.cli.vector_cmd as vector
+    monkeypatch.setattr(preprocess, "_require_writer_capability", lambda **kwargs: None)
+    monkeypatch.setattr(vector, "_require_writer_capability", lambda **kwargs: None)
+
+
 class _FakeEmbedder:
     def embed_documents(self, documents):
         return [[0.1] * 4 for _ in documents]