v1.0.0 Initial Release

● Release v1.0.0 🎉

First stable release - Python Substack API client with HTTP REST API server and CLI tools for automated draft creation, publishing, and multi-account management. Features rich markup syntax, interactive documentation at /docs, and comprehensive content formatting support.

What works: Draft creation/publishing, multi-account support, REST API server. Known limitation: Cannot create new schedules via API.