Add index-free MiniCPM scout, local QLoRA training, and measured evaluation

tests/test_keyword_baseline.py

@@ -0,0 +1,17 @@
+from micro_scout.keyword_baseline import search_keywords
+
+
+def test_keyword_control_returns_verified_ranges_within_file_boundaries(tmp_path):
+    (tmp_path / "retry.py").write_text("def retry():\n    return exponential_backoff()\n")
+    result = search_keywords(tmp_path, "Find exponential backoff")
+    assert result["model"] is None
+    assert result["tool_calls"] == 3
+    assert len(result["results"]) == 1
+    ref = result["results"][0]
+    assert ref["start_line"] == 1 and ref["end_line"] == 2 and ref["verified"]
+    assert result["input_tokens"] == 0
+
+
+def test_keyword_control_abstains_when_no_terms_match(tmp_path):
+    (tmp_path / "a.py").write_text("print(42)\n")
+    assert search_keywords(tmp_path, "unknown implementation")["status"] == "abstained"