masterclass-dl፦ ሁሉም ስሪቶች እና የቆዩ ስሪቶች

## What's Changed

### New Features
**Sessions support** — Download MasterClass Sessions URLs (`/sessions/classes/{slug}`) via the camps API, with module/task structure (#13)
**SSO login (macOS)** — New `safari-login` command reads session cookies directly from Safari for Google/Apple/company SSO accounts (#12)
**HTTP resilience** — Added timeouts, retry with exponential backoff, and partial download resume (#10)

### Bug Fixes & Security
Fix: prevent password exposure in command-line arguments (#11)
Fix: memory leak, silent failures, and security issues (#9)
Fix: missing HTTP status check in camp task media UUID fetch

### Other
Added MIT License
Updated README to document Sessions support and new CLI examples

**Full Changelog**: https://github.com/RythenGlyth/masterclass-dl/compare/v1.0.2...v1.1.0