feat: ExcelParser 基础（workbook/sheet 读取 + source_uri）

tests/test_excel_reader.py

@@ -0,0 +1,24 @@
+import pytest
+
+from genesis.parsers.excel_reader import open_workbook, sheet_matrix
+from genesis.parsers.provenance import build_source_uri
+
+from tests.excel_helpers import new_workbook, save_workbook
+
+
+def test_build_source_uri_format():
+    assert build_source_uri("要求.xlsx", "機能一覧", "A5") == "要求.xlsx#機能一覧!A5"
+
+
+def test_open_workbook_and_sheet_matrix(tmp_path):
+    wb = new_workbook({"機能一覧": [["機能ID", "機能名"], ["F001", "社員登録"]]})
+    path = save_workbook(tmp_path, wb)
+    ws = open_workbook(path)["機能一覧"]
+    assert sheet_matrix(ws) == [["機能ID", "機能名"], ["F001", "社員登録"]]
+
+
+def test_open_workbook_rejects_xls(tmp_path):
+    bad = tmp_path / "old.xls"
+    bad.write_bytes(b"not really xls")
+    with pytest.raises(ValueError):
+        open_workbook(bad)