- Rename package to tech.mobiledeveloper.openmattermost (organization + aurora.name)
- Pin RPM version to 2.0.0 (drop +build metadata; '+' is invalid in RPM Version)
- build-release.sh: build both required Aurora targets (aarch64 + armv7hl)
- Track custom aurora scaffold (main.cpp deep links, desktop permissions, CMakeLists, spec)
- Move Android signing keystore/key.properties out of the tree; harden .gitignore
- Add README, Apache-2.0 LICENSE, and RUSTORE-PUBLISH.md publishing runbook

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>