Fix Python version inconsistencies across workflows and documentation

[Copilot]

PR #2 introduced pyproject.toml with requires-python = ">=3.13" but left the sync workflow pinned to Python 3.12, causing incompatibility.

Changes

• .github/workflows/sync.yml: Updated Python version from 3.12 → 3.13
• README.md: Updated requirement documentation from 3.12+ → 3.13+
• .gitignore: Added plan.json (generated artifact) and fixed formatting

All Python versions now align with the 3.13+ requirement specified in pyproject.toml.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• astral.sh
  • Triggering command: /usr/bin/curl curl -LsSf REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Pull Request: #2

Please review and correct any errors that are preventing the merging of this branch. Thank you!

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[Copilot]

Pull request overview

This PR fixes inconsistencies in Python version requirements across the project by updating all references from Python 3.12 to Python 3.13 to match the pyproject.toml requirement. It also improves the .gitignore file by properly formatting entries and adding plan.json to prevent accidental commits of generated artifacts.

Key Changes:

• Updated Python version requirement from 3.12 to 3.13 in documentation and CI workflows
• Fixed .gitignore formatting and added generated artifact exclusions

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
README.md	Updated Python version requirement from 3.12+ to 3.13+ in documentation to match pyproject.toml
.gitignore	Fixed formatting by properly separating .idx entry with blank line and added plan.json to exclude generated artifacts
.github/workflows/sync.yml	Updated Python version from 3.12 to 3.13 to align with project requirements

Review Result: ✅ No issues found. All changes are correct and consistent. The PR successfully addresses the version inconsistencies and improves repository hygiene by excluding generated artifacts.

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