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feat(telegram): full Telegram integration with bot, login, bridges, and mini app
feat(core): implement E2E encryption, extended media, bots, analytics, UI/UX, performance, and security for v2.0.0
feat(app): initial full-stack implementation of Stogram PWA messenger with real-time chat, VoIP, and Docker support
feat(security): add IP rate limiting, CSP & HSTS headers, audit logging, update deps, add tests & CI