feat: PDF-Parser VR/HVB/DKB mit Registry und Fixture-Tests

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

finance/tests/test_bank_parsers.py

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+from decimal import Decimal
+from pathlib import Path
+
+import pytest
+
+from app.parsers.registry import parse_pdf
+from app.parsers.validate import balance_difference
+
+FIXTURES = Path(__file__).parent / "fixtures"
+CASES = [("vr_beispiel.pdf", "vr"), ("hvb_beispiel.pdf", "hvb"),
+         ("dkb_beispiel.pdf", "dkb")]
+
+
+@pytest.mark.parametrize("filename,bank", CASES)
+def test_parse_fixture(filename, bank):
+    path = FIXTURES / filename
+    if not path.exists():
+        pytest.skip(f"Fixture {filename} fehlt")
+    stmt = parse_pdf(path)
+    assert stmt.bank == bank
+    assert stmt.opening_balance is not None
+    assert stmt.closing_balance is not None
+    assert len(stmt.transactions) > 0
+    assert balance_difference(stmt) == Decimal("0")