Release v2.0.3: bug fixes, type hints, and snap core24 migration

[clobrano]

Summary

This release prepares v2.0.3 with bug fixes, improved type safety, and infrastructure updates. All changes are backwards compatible with no breaking API changes.

Key Changes

Bug Fixes

• Improved task name wrapping in reports with proper word-boundary handling (72-char limit with multi-line support)
• Fixed Task.cancel() to return empty string instead of None
• Fixed Task.start() to return bool instead of None
• Added null-safety checks to start_task_handler

Type Safety

• Added Tuple return type hints to handlers.py
• Added Optional return type hint to Task.get_running() in tasks.py
• Updated test assertions to match corrected Task API return types

Infrastructure & Maintenance

• Migrated snap base from core20 (EOL) to core24 (Ubuntu 24.04, supported until April 2029)
• Updated snap version to 2.0.2 to match PyPI release
• Simplified snap build configuration with core24's native Python 3.12 support
• Updated .gitignore to exclude build artifacts (build/, dist/, egg-info)
• Enhanced Makefile test target with coverage reporting (--cov=src)
• Added pytest-cov to development dependencies

Files Modified

• .gitignore, Makefile, requirements.txt
• snap/snapcraft.yaml
• src/app.py, src/handlers.py, src/tasks.py
• src/tests/test_base.py

This is a patch release (2.0.2 → 2.0.3) containing only bug fixes and maintenance improvements.

https://claude.ai/code/session_018VzLxkpguiUVZAU7CF8ocB