Description

This PR introduces a new feature to generate PDF reports from matched questionnaire items using fpdf. The function generate_pdf_report() creates a structured and readable PDF summarizing matched question pairs across instruments, with optional threshold filtering and match score display.

The report includes:

• Table-formatted matched question pairs with instrument names and question numbers.

• Match percentage per pair.

• A count of matched items in the header.

• A configurable threshold to filter weaker matches.

A new test file tests/test_export_pdf_report.py was also added to validate the PDF export functionality and the requirements.txt where updated because it needs fpdf.

Fixes # (issue)

Not linked to a specific issue — this is a standalone feature contribution, since i implemented it in python, there is an issue in the harmony app which wants this feature tho ( this would be #53 then)

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)

Testing

Tests were added in tests/test_export_pdf_report.py:

test_high_threshold_yields_no_matches: Verifies the report correctly shows 0 matches with a 99% threshold.

test_default_threshold_yields_some_matches: Verifies that matches appear with the default 50% threshold.

To run the tests:
pytest -q

Test Configuration

• Library version: latest main of harmony
• OS: Windows 10
• Toolchain: Python 3.11, PyCharm, pytest, venv

Checklist

• [x ] My PR is for one issue, rather than for multiple unrelated fixes.
• [x ] My code follows the style guidelines of this project. I have applied a Linter (recommended: Pycharm's code formatter) to make my whitespace consistent with the rest of the project.
• [x ] I have performed a self-review of my own code
• [x ] I have commented my code, particularly in hard-to-understand areas
• [x ] I have made corresponding changes to the documentation
• [x ] My changes generate no new warnings
• [x ] I have added tests that prove my fix is effective or that my feature works
• [x ] New and existing unit tests pass locally with my changes
• [x ] Any dependent changes have been merged and published in downstream modules
• [x ] I have checked my code and corrected any misspellings
• [x ] The Harmony API is not broken by my change to the Harmony Python library
• [x ] I add third party dependencies only when necessary. If I changed the requirements, it changes in requirements.txt, pyproject.toml and also in the requirements.txt in the API repo
• [x ] If I introduced a new feature, I documented it (e.g. making a script example in the script examples repository so that people will know how to use it.

Optionally: feel free to paste your Discord username in this format: discordapp.com/users/yourID in your pull request description, then we can know to tag you in the Harmony Discord server when we announce the PR.