[Feature Request] Add "title" parameter to Shoutrrr notification payloads

[bl4ckswordsman]

Description:

Describe the Feature

Currently, when Netronome triggers alerts or notifies on speed test completions, it sends the notification message text via Shoutrrr, but does not specify a title parameter in the Shoutrrr call context.

As a result, when using notification services that support separate titles - such as Shoutrrr's generic webhook receiver using template=json- the generated JSON payload leaves the title field empty:

{
  "title": "",
  "message": "Speed test completed! \nDownload: 940 Mbps\nUpload: 930 Mbps..."
}

This empty title field breaks downstream integrations (like chat bot plugins/generic webhooks) that rely on a separate title to manage push notification previews or format messages cleanly.

Code Reference

In internal/notifications/notifications.go, Shoutrrr's Send method is called with nil parameters:

1. In SendNotification (line 166):

   errs := tempNotifier.Send(message, nil)

2. In sendDirect (line 388):

   for _, err := range n.router.Send(message, nil) {

Proposed Solution

We can use the "github.com/containrrr/shoutrrr/pkg/types" package to pass a title parameter to Shoutrrr via a types.Params map.

Inside SendNotification, we can determine a friendly title based on the category and eventType parameters (e.g., mapping them to cleaner titles like "Netronome Speedtest Complete", "Netronome Agent Offline", etc., or just generating a generic "Netronome: [Category]" title).

For example:

import (
	// ... other imports ...
	"github.com/containrrr/shoutrrr/pkg/types"
)

// In SendNotification:
title := "Netronome Alert"
if category != "" {
	// e.g., format category dynamically or map it
	title = fmt.Sprintf("Netronome: %s", strings.Title(category)) 
}

params := types.Params{
	"title": title,
}

errs := tempNotifier.Send(message, &params)

And in sendDirect:

params := types.Params{
	"title": "Netronome Notification",
}
for _, err := range n.router.Send(message, &params) {

This simple enhancement would allow Shoutrrr to correctly populate the title field in its payloads across all supported service backends.