Bug fixes (non-breaking):
- Register accept-event tool in calendar module (was dead code)
- Add missing callGraphAPI + ensureAuthenticated imports to rules/index.js
(edit-rule-sequence would throw ReferenceError at runtime)
- Make calendar event timezone configurable via MS_TIMEZONE env var
(was hardcoded to UTC; default is now Eastern Standard Time)
Version bump: 1.0.0 → 1.0.1
README updated: 21 tools, MS_TIMEZONE in config table, known issues pruned