test: 补充测试覆盖率 — DB/CLI/Search/Ingest + 修复 chromadb 异常兼容

tests/test_cli.py

@@ -61,3 +61,21 @@ class TestCLIJSONOutput:
         if result.stdout.strip():
             data = json.loads(result.stdout)
             assert isinstance(data, dict)
+
+
+def test_ingest_help():
+    """ingest --help 正常输出."""
+    result = runner.invoke(app, ["ingest", "--help"])
+    assert result.exit_code == 0
+
+
+def test_search_help():
+    """search --help 正常输出."""
+    result = runner.invoke(app, ["search", "--help"])
+    assert result.exit_code == 0
+
+
+def test_export_help():
+    """export --help 正常输出."""
+    result = runner.invoke(app, ["export", "--help"])
+    assert result.exit_code == 0