Mild formatting changes

[sfreeman422]

This pull request makes a minor update to the formatting of quotes in AI service messages to improve their appearance. Specifically, quotes are now rendered in italicized markdown format instead of plain text.

• Formatting improvements:
  • Quotes are now wrapped in underscores for italics in markdown blocks (e.g., _"A quote"_ instead of "A quote"), both in the AIService class and its corresponding test. [1] [2]

[Copilot]

Pull request overview

Updates the Moonbeam redeploy Slack message formatting so that the optional AI quote is italicized and only included when present.

Changes:

• Render the optional quote as italic markdown (_"…"_) instead of plain quoted text.
• Omit the quote block entirely when no quote is returned, while keeping the divider and changelog.
• Update the redeployMoonbeam unit test expectation to match the new quote formatting.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
packages/backend/src/ai/ai.service.ts	Adjusts Slack message blocks to conditionally include an italicized quote block and simplifies divider formatting.
packages/backend/src/ai/ai.service.spec.ts	Updates the redeployMoonbeam test to expect the new italic quote markdown text.

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