Release v0.2.0

Highlights

• index --watch: continuous incremental reindexing on an interval
• install-hook: git post-commit hook that reindexes on every commit
• recall since parameter (e.g. "7d"/"24h"/"2w") to scope recall to recent memory
• stats now breaks down conversations by agent and shows index freshness
• fridai --version flag

Internal

• Hoisted shared parser helpers into agent_recall
• Translated test comments/docstrings to English

Full Changelog: v0.1.0...v0.2.0