chore: bump version to 0.1.4

[longieirl]

Pull Request

Summary

Bumps all three version files from 0.1.3 to 0.1.4 ahead of the core-v0.1.4 release tag. This release publishes the patched Docker image that fixes CVE-2026-31789 (merged in #163).

Changes

• packages/parser-core/pyproject.toml: 0.1.3 → 0.1.4
• packages/parser-core/src/bankstatements_core/__version__.py: 0.1.3 → 0.1.4
• packages/parser-free/pyproject.toml: 0.1.3 → 0.1.4

Type

• Bug fix
• New feature
• Breaking change
• Refactoring
• Documentation
• Performance
• Security

Testing

• Tests pass (coverage >= 91%)
• Manually tested
• make docker-integration passed locally

No logic changes — version strings only.

Checklist

• Code follows project style
• Self-reviewed
• Documentation updated (if needed)
• No new warnings

Downstream impact

• This PR changes a public interface in bankstatements_core (exported class, function, or exception)

After merge, cut tag core-v0.1.4 — release.yml publishes on core-v* tags and will push the patched image to :latest.