unhide insight service (#5190)

## Problem solved

Short description of the bug fixed or feature added

<!-- start pr-codex -->

---

## PR-Codex overview
This PR removes an entry from the `HIDDEN_SERVICES` array in the `validations.ts` file, indicating a potential update in the handling of API keys.

### Detailed summary
- Removed `"insight"` from the `HIDDEN_SERVICES` array in the `validations.ts` file.

> ✨ Ask PR-Codex anything about this PR by commenting with `/codex {your question}`

<!-- end pr-codex -->

Author: iuwqyir

apps/dashboard/src/components/settings/ApiKeys/validations.ts

@@ -149,4 +149,4 @@ export type ApiKeyPayConfigValidationSchema = z.infer<
 >;
 
 // FIXME: Remove
-export const HIDDEN_SERVICES = ["relayer", "chainsaw", "insight"];
+export const HIDDEN_SERVICES = ["relayer", "chainsaw"];