Harden contract initialization guards

[AnnabelJoe]

Category: Backlog

Description: Harden contract initialization guards.

Note: recreated without labels after earlier label errors.

[Okorie2000-code]

@Okorie2000-code has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi Maintainer, can I work on this?

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Okorie2000-code to this issue.