docs: Add security policy for responsible vulnerability disclosure

[Gbangbolaoluwagbemiga]

Description

SECURITY.md exists (5030 bytes) but should be reviewed and enhanced with:

• Clear disclosure timeline (acknowledge within 48h, fix within 90 days)
• PGP key for encrypted reports
• Bug bounty information (if applicable)
• Scope of covered components

Acceptance Criteria

• SECURITY.md updated with disclosure timeline
• Contact email verified and monitored
• Scope section lists covered components

[iamstephhanson]

@iamstephhanson has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

Hello maintainer,
I'd like to take "docs: Add security policy for responsible vulnerability disclosure". I can draft SECURITY.md with reporting channels, disclosure timeline, scope, safe harbor, and response process following best practices.
Please assign to me, I will ensure clear responsible disclosure.

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

[CelestinaBeing]

@CelestinaBeing has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

Hi Team, Please assign, i would love to fix efficiently

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

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Congratulations, @CelestinaBeing! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on September 30, 2026.

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[drips-wave]

This issue has been completed by @CelestinaBeing as part of the Stellar Wave Program's 9th Wave 🥳

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