feat: Portal, Email Inbound, Discuss + module improvements

- Portal: /my/* routes, signup, password reset, portal user support
- Email Inbound: IMAP polling (go-imap/v2), thread matching
- Discuss: mail.channel, long-polling bus, DM, unread count
- Cron: ir.cron runner (goroutine scheduler)
- Bank Import, CSV/Excel Import
- Automation (ir.actions.server)
- Fetchmail service
- HR Payroll model
- Various fixes across account, sale, stock, purchase, crm, hr, project

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

open.md

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+# Offene Punkte
+
+> Stand: 2026-04-12
+> Business-Module: alle auf 95% — KOMPLETT
+> Odoo Community Core: Portal + Email Inbound + Discuss — KOMPLETT
+
+---
+
+## Odoo Community Core — KOMPLETT
+
+- [x] **Portal** — Portal-User (share=true), /my/* Routes, Signup, Password Reset ✅ 2026-04-12
+- [x] **Email Inbound** — IMAP Polling (go-imap/v2), Email Parser, Thread Matching ✅ 2026-04-12
+- [x] **Discuss** — mail.channel + mail.channel.member, Long-Polling Bus, DM, Channel CRUD, Unread Count ✅ 2026-04-12
+
+---
+
+## Frontend / UI Zukunft — 2 Items (langfristig)
+
+| # | Was |
+|---|-----|
+| 1 | UI modernisieren — schrittweise schneller, stabiler, optisch erneuern |
+| 2 | View-Format — langfristig format-agnostisch (JSON-fähig), weg von XML wo möglich |
+
+
+