Support Indonesian number format in transaction amounts

[rager306]

Updated the regex pattern for transaction amounts to correctly identify numbers with comma decimal separators (Indonesian format) while maintaining support for dot decimal separators (US format). Added a new test file to verify transaction extraction for both formats.

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PR created automatically by Jules for task 12851599774878756901 started by @rager306

Summary by CodeRabbit

• New Features

  • Added support for parsing numbers in multiple locale formats, including Indonesian-style formatting with thousands separators and comma as decimal delimiter.

• Tests

  • Expanded test coverage for transaction extraction to verify handling of multiple number formats.

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[coderabbitai]

Walkthrough

Modified the amount pattern regex to support Indonesian number formatting (dots for thousands, comma for decimal) alongside standard decimal notation. Added comprehensive unit tests to validate transaction extraction with both format variants and missing user ID scenarios.

Changes

Cohort / File(s)	Summary
Amount Pattern Regex Enhancement pdfparser/utils.py	Updated _AMOUNT_PATTERN regex to accept both standard decimal notation (e.g., 1,234.56) and Indonesian format (e.g., 1.234.567,89) for flexible number parsing.
Transaction Extraction Test Suite tests/test_transaction_extraction.py	Added 79 lines of unit tests covering transaction extraction with US and Indonesian number formats, including scenarios with and without user fields. Tests validate date, user, debit, credit, and balance field extraction.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: updating regex pattern to support Indonesian number format (comma as decimal separator) in transaction amounts.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix-indonesian-transaction-amounts-12851599774878756901

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