v2.0.2

What's New

• CI test gate: Release workflow now runs all unit tests before building .deb packages
• --version flag: python talk_spotter.py --version prints the current version
• Central version constant: lib/version.py is the single source of truth; SOTA User-Agent now stays in sync
• SOTA spotter tests: 18 new unit tests covering OAuth token storage/refresh and spot posting
• Updated CLAUDE.md: Reflects the lib/, sources/, spotters/, tests/ layout from 2.0.1