Wrap ExecStartPost in /bin/sh -c to enable variable expansion for
UPTIME_SUCCESS_URL. Add EnvironmentFile to load vars from .env.
Changes:
- Update ExecStartPost to use shell for expansion
- Add EnvironmentFile=/.env to service
- Update fail service ExecStart similarly
Add core IMAP forwarding logic with time-based searches and Message-ID
deduplication to prevent duplicates in destination mailbox.
Changes:
- Implement SINCE-based email search using last_run.txt for incremental forwarding
- Add Message-ID extraction and IMAP checks for deduplication
- Configure systemd user services with drop-in overrides for portability
- Integrate Uptime Kuma pings for monitoring
- Set up virtual environment for dependency isolation
- Update documentation and configuration templates
