Add integration test for trade webhook firing only for registered event types

[Chucks1093]

Summary

A creator who registers a webhook with events: ['buy'] should not receive a callback when a sell event occurs. An integration test should confirm the event type filter is enforced correctly at delivery time.

Scope

• Register a webhook with events: ['buy'] only
• Simulate a sell trade event through the indexer
• Assert the webhook callback was not called
• Simulate a buy event and assert the callback was called

Acceptance Criteria

• Sell event does not trigger a buy-only webhook
• Buy event does trigger a buy-only webhook
• Same test repeated in reverse for a sell-only webhook

ETA: 12 hours

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Coordinate on Telegram

[theladyanina]

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

hi maintainer please i have knowledge in this can I work on this?

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[Maximum-Prosper]

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Hi maintainer.
I'd likely to work on this.
Please kindly assign.

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[KingDavid9999]

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hi id love to work on this issue

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[Olasunkanmi975]

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please assign

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[Benedict315]

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Hello please assign

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[madisonsc52-del]

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​Hi maintainer, I would love to work on this issue. I can get started on it right away. Could you please assign it to me

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[Hollujay]

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I would like to work on this issue because I will get it done.

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[dedukpe]

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Hello
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[Enemuo-debug]

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Can I please work on this task?

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