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>

cmd/odoo-server/main.go

@@ -19,6 +19,7 @@ import (
 
 	// Import all modules (register models via init())
 	_ "odoo-go/addons/base"
+	_ "odoo-go/addons/mail"
 	_ "odoo-go/addons/account"
 	_ "odoo-go/addons/product"
 	_ "odoo-go/addons/sale"
@@ -126,6 +127,11 @@ func main() {
 		log.Printf("odoo: session table init warning: %v", err)
 	}
 
+	// Start cron scheduler
+	cronScheduler := service.NewCronScheduler(pool)
+	cronScheduler.Start()
+	defer cronScheduler.Stop()
+
 	// Start HTTP server
 	srv := server.New(cfg, pool)
 	log.Printf("odoo: starting HTTP service on %s:%d", cfg.HTTPInterface, cfg.HTTPPort)