Emit Event on Payment Initiated

[Abdulazeem-code]

Description

The Soroban contract should emit an event when a payment routing starts.

Acceptance Criteria

• Emits 'payment_initiated' event with sender and amount

Implementation Steps

1. Import env.events()
2. Define symbol for 'payment_initiated'
3. Publish event at start of function

Branching Instructions

Please create a branch from main following this naming convention:
feat/event-initiated

[Olagoke22]

@Olagoke22 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I would like to work on this issue maintainer

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[drips-wave]

Congratulations, @Olagoke22! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @Olagoke22: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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