fix: support Indonesian currency format and fix NoneType error in pdfoxide parser

[rager306]

This PR addresses two issues:

1. The regex pattern for amounts _AMOUNT_PATTERN only supported US format (dot decimal), causing Indonesian amounts (comma decimal) to be misidentified or ignored. It has been updated to support both.
2. The pdfoxide parser could raise a TypeError if extract_text returned None, as the fallback or "" was effectively commented out by a type: ignore comment. This has been fixed to ensure safe string concatenation.

Tests have been added to verify the fix for Indonesian amounts, and existing tests pass.

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PR created automatically by Jules for task 1786048993213094149 started by @rager306

Summary by CodeRabbit

• Bug Fixes

  • Enhanced PDF text extraction to handle edge cases more reliably.

• New Features

  • Added support for multiple number formats (US: 1,234.56 and Indonesian: 1.234,56) in monetary value parsing.

• Tests

  • Added test coverage for locale-aware number format parsing across different regional formats.

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[coderabbitai]

Walkthrough

This PR fixes a potential None handling issue in PDF text extraction and extends monetary value parsing to support both US and Indonesian number formats. Two test cases validate the locale-aware number parsing functionality.

Changes

Cohort / File(s)	Summary
PDF Text Extraction Fix pdfparser/pdfoxide_parser.py	Fixed None handling in PDF text extraction by coercing None results to empty strings using or "", ensuring each page appends a string value even when extraction yields None.
Locale-Aware Number Format Support pdfparser/utils.py	Updated _AMOUNT_PATTERN regex to accept both US (1,234.56) and Indonesian (1.234,56) decimal formats by expanding pattern to `r"^(?:[\d,]+.\d{2}
Test Coverage tests/test_utils.py	Added two new unit tests (test_extract_transactions_indonesian_format, test_extract_transactions_us_format) validating extraction of transactions with locale-specific number formatting and field parsing.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 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 summarizes both main changes in the PR: fixing a NoneType error in the pdfoxide parser and adding support for Indonesian currency format.
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-amounts-pdfoxide-1786048993213094149

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