feat(webhook): add API key support for webhook notifications

[0xSysR3ll]

Description

This PR introduces an optional API key field in the webhook settings, allowing users to authenticate to the webhook using the X-API-Key header.

Screenshot (if UI-related)

To-Dos

• Disclosed any use of AI (see our policy)
• Successful build pnpm build
• Translation keys pnpm i18n:extract
• Database migration (if required)

Issues Fixed or Closed

• Fixes #XXXX

[M0NsTeRRR]

Should we rework this feature and allow users to configure the headers they need? That way, it would cover all future feature requests regarding this.

[0xSysR3ll]

Should we rework this feature and allow users to configure the headers they need? That way, it would cover all future feature requests regarding this.

Since the X-API-Key is a de facto standard, I thought it would be better to keep it like this. But yeah, maybe we could implement a custom headers feature; allowing to put literally everything we want, like you said.

[gauthier-th]

Should we rework this feature and allow users to configure the headers they need? That way, it would cover all future feature requests regarding this.

Since the X-API-Key is a de facto standard, I thought it would be better to keep it like this. But yeah, maybe we could implement a custom headers feature; allowing to put literally everything we want, like you said.

Yeah, it's probably better, some 3rd party apps use other ways to authenticate. That's also what I implemented in *arr.

[github-actions]

This pull request has merge conflicts. Please resolve the conflicts so the PR can be successfully reviewed and merged.

[0xSysR3ll]

That's also what I implemented in *arr.

Oh, I will check this out !