Fixed
- Two-tier session protection — Replaces the single-backup approach from v7.1.1 with a robust two-tier system:
- Golden backup (
.session.authenticated) — only written after a successful login, guarantees a known-good recovery point that crash-loops can never corrupt - Pre-connect snapshot (
.session.bak) — taken before every connect attempt as a secondary fallback - On auth failure, restores from golden backup first, then snapshot. Prevents Telethon's silent DH key renegotiation from permanently destroying authenticated sessions during crash-loops.
- Uses raw
sqlite3to verifyauth_keypresence before deciding whether to back up or restore, avoiding false positives from empty/corrupted session files - Flushes WAL checkpoint before creating golden backup to ensure file completeness
- Golden backup (
📋 Full changelog: docs/CHANGELOG.md