Tooltip missing lifecycle status text for unavailable features

[leemthompo]

Describe the bug

Description:
Tooltip shows incomplete text - missing lifecycle status at the beginning of the sentence.

Root cause: lifecycleFull variable is empty/null when ProductLifecycle.Unavailable, causing the tooltip template to render with missing text.

Remedy

The issue is that lifecycleFull isn't being set properly for the Unavailable lifecycle state, so the tooltip template renders with an empty string at the beginning.

https://github.com/elastic/docs-builder/blob/main/src/Elastic.Markdown/Myst/Components/ApplicableToComponent.cshtml#L253

I nominate @theletterf to fix this.

Expected behavior

Expected: "Unavailable on Elastic Cloud Serverless unless otherwise specified."
Actual: "on Elastic Cloud Serverless unless otherwise specified."

Steps to reproduce

Read this issue

Tooling

• docs-builder
• migration tooling
• I'm not sure