feat(hosted key): Add exa hosted key #3221

Bugbot Review

Bugbot Analysis Progress (16m 53s elapsed)

✅ Gathered PR context (2s)
✅ Completed bug detection (15m 8s)
✅ Posted analysis results (1m 43s)

Final Result: Bugbot completed review and found 1 potential issue.

Request ID: serverGenReqId_445cae8d-3b3a-4dd6-af4f-e4b517064825

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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