Add configurable LM Studio flushing and LLM retries.

test/test_processing.py

@@ -127,3 +127,39 @@ def test_process_batch_is_sequential_reuses_session_and_continues_after_error():
     assert all(len(call.args[0]) == 1 for call in session.call.call_args_list)
     assert writer_class.return_value.write.call_count == 2
     session.close.assert_called_once()
+
+
+def test_process_batch_flushes_after_configured_attempt_count(monkeypatch):
+    monkeypatch.setattr("photools3.processing.settings.llm_flush_every_photos", 2)
+
+    class FakePhoto:
+        def __init__(self, path):
+            self.path = path
+
+        def __enter__(self):
+            return self
+
+        def __exit__(self, exc_type, exc_value, traceback):
+            return None
+
+    response = LlmResponseCaptionsAndKeywords(caption="Ein Haus", tags=["architektur"])
+    session = MagicMock()
+    session.call.side_effect = [
+        response,
+        RuntimeError("temporary error"),
+        response,
+        response,
+        response,
+    ]
+    paths = [Path(f"{i}.jpg") for i in range(5)]
+
+    with (
+        patch("photools3.processing._create_session", return_value=session),
+        patch("photools3.processing.Photo", FakePhoto),
+        patch("photools3.processing.MetadataWriter"),
+    ):
+        outcomes = process_batch(paths, ProcessingMode.BOTH)
+
+    assert len(outcomes) == len(paths)
+    assert session.flush_model.call_count == 2
+    session.close.assert_called_once()