fix(ci): restore db safety smoke backup and sample-test skip behavior

tests/test_kb_bank_pdf.py

@@ -9,7 +9,18 @@ from jarca_ledger_mcp import service
 
 PDF_PATH = Path("/root/.hermes/cache/documents/doc_5a12af727ae0_KB거래내역조회_5704_2606171043.pdf")
 PDF_PASSWORD = os.environ.get("KB_BANK_PDF_TEST_PASSWORD", "")
-SAMPLE_AVAILABLE = PDF_PATH.exists() and bool(PDF_PASSWORD)
+
+
+def _sample_available(path: Path, password: str) -> bool:
+    if not password:
+        return False
+    try:
+        return path.is_file()
+    except OSError:
+        return False
+
+
+SAMPLE_AVAILABLE = _sample_available(PDF_PATH, PDF_PASSWORD)
 
 
 @pytest.mark.skipif(not SAMPLE_AVAILABLE, reason="sample KB Bank PDF/password is not available")

tests/test_toss_securities_pdf.py

@@ -10,7 +10,14 @@ from jarca_ledger_mcp.toss_securities_pdf import parse_toss_securities_pdf
 SAMPLE = Path("/root/.hermes/cache/documents/doc_f4cfe8e0221f_거래내역서_20250618_20260617_1.pdf")
 
 
-@pytest.mark.skipif(not SAMPLE.exists(), reason="sample Toss Securities PDF is not available")
+def _sample_available(path: Path) -> bool:
+    try:
+        return path.is_file()
+    except OSError:
+        return False
+
+
+@pytest.mark.skipif(not _sample_available(SAMPLE), reason="sample Toss Securities PDF is not available")
 def test_parse_toss_securities_pdf_sample():
     parsed = parse_toss_securities_pdf(str(SAMPLE))
     assert parsed["metadata"]["holder_name"] == "고진환"
@@ -22,7 +29,7 @@ def test_parse_toss_securities_pdf_sample():
     assert any(tx.section == "USD" and tx.action == "외화증권배당금입금" for tx in parsed["transactions"])
 
 
-@pytest.mark.skipif(not SAMPLE.exists(), reason="sample Toss Securities PDF is not available")
+@pytest.mark.skipif(not _sample_available(SAMPLE), reason="sample Toss Securities PDF is not available")
 def test_preview_and_import_toss_securities_pdf_sample(tmp_path):
     db_path = str(tmp_path / "ledger.sqlite3")
     preview = service.preview_toss_securities_pdf_import(str(SAMPLE), db_path=db_path)