feat: Add Telnyx Voice alerts

[LuvForAirplanes]

Summary

In this pull request, the following changes are made:

• I added an Telnyx Voice API integration so that Telnyx can also call users with alerts
• I used Claude Opus to assist me, especially with the Vue, as I am not super familiar. I have written quite a few Telnyx integrations before in private products.

Please follow this checklist to avoid unnecessary back and forth (click to expand)

• ⚠️ If there are Breaking change (a fix or feature that alters existing functionality in a way that could cause issues) I have called them out
• 🧠 I have disclosed any use of LLMs/AI in this contribution and reviewed all generated content.
  I understand that I am responsible for and able to explain every line of code I submit.
• 🔍 Any UI changes adhere to visual style of this project.
• 🛠️ I have self-reviewed and self-tested my code to ensure it works as expected.
• 📝 I have commented my code, especially in hard-to-understand areas (e.g., using JSDoc for methods).
• 🤖 I added or updated automated tests where appropriate.
• 📄 Documentation updates are included (if applicable).
• 🧰 Dependency updates are listed and explained.
• ⚠️ CI passes and is green.

Screenshots for Visual Changes

Event	Before	After
UP	N/A, Telnyx didn't exist
DOWN	N/A, Telnyx didn't exist
Certificate-expiry	N/A, Telnyx didn't exist
Testing	N/A, Telnyx didn't exist

[Copilot]

Pull request overview

Adds a new Telnyx Voice notification channel that places outbound calls via Telnyx Call Control and speaks the alert message when the call is answered, including UI configuration and a public webhook for call events.

Changes:

• Added UI form + i18n strings for configuring Telnyx Voice (App ID, base URL, optional speech template).
• Registered a new telnyxVoice notification type in the frontend and backend provider list.
• Added a public webhook endpoint and a new server-side Telnyx Voice provider to manage call lifecycle (speak/hangup).

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/lang/en.json	Adds translation strings for Telnyx Voice configuration fields and help text.
src/components/notifications/index.js	Registers the new TelnyxVoice.vue notification form component.
src/components/notifications/TelnyxVoice.vue	New Vue form for Telnyx Voice provider configuration.
src/components/NotificationDialog.vue	Adds “Telnyx Voice” and renames existing Telnyx label to “Telnyx SMS”.
server/routers/api-router.js	Adds a public Telnyx call-control webhook callback route.
server/notification.js	Registers the new Telnyx Voice notification provider.
server/notification-providers/telnyx-voice.js	Implements Telnyx Voice call placement + webhook handling (speak/hangup) with in-memory pending call state.

[LuvForAirplanes]

@CommanderStorm I believe I'm ready for review.

[CommanderStorm]

I am going to give you fairly general feedback: please look at the rest of the codebase if what you are doing is done this way.
There are a number of cases where this is doing something differeent:

• there exists a webook into UK
• there the frontend templating is not the same as literally all others
• ..

I don't enjoy reading code written by opus so that makes your wait time in the queue a bit longer. that is life.

[LuvForAirplanes]

there the frontend templating is not the same as literally all others

I do not understand what you mean, I based this off the other views. Are you clear on the fact that it is allowing you to specify custom text, but then specify a placeholder for the Uptime Kuma injected text?

there exists a webook into UK

Sorry about that, I didn't find that. I will take a look.

[LuvForAirplanes]

OK, I'm not understanding what you mean about the webhooks either. I must be looking at the wrong spot. Do you know of another one that accepts incoming messages via web hook?