Add indexer replay dry-run mode option

[Chucks1093]

Summary
Add indexer replay dry-run mode option

Scope

• add dry-run mode for index replay operations\n- ensure no write side effects in dry-run mode\n- document usage for maintainers

Acceptance Criteria

• scoped change is implemented with no unrelated file churn
• docs/tests are updated where applicable
• contributor can validate the outcome locally

Contributor coordination: if you pick this up, reach out in Telegram for updates or clarification: https://t.me/accesslayerorg

[khanavi272-spec]

@khanavi272-spec has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

I would like to work on this issue

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[wheval]

@wheval has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hello i would love to work on this

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Congratulations, @wheval! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on April 29, 2026.

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[drips-wave]

This issue has been completed by @wheval as part of the Stellar Wave Program's 4th Wave 🥳

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