Write in-memory mock integration tests for indexer_metrics_collector

[francisdouglas-ux]

Problem & Goal

Implement Jest database test coverage simulating RPC events inside indexer_metrics_collector.

Context & Components

• Target Repository: escrow-backend
• Module/Component: indexer_metrics_collector (Poller performance telemetry tracker)

Implementation Details

1. Review the existing codebase inside the escrow-backend directory.
2. Locate the source files relating to indexer_metrics_collector.
3. Implement the feature logic/validation rules step-by-step.
4. Ensure code conforms to codebase patterns (lints, formats, types).

Verification & Testing Requirements

• Validation check: Confirm all simulated events write successfully to the database schema.
• Add comprehensive test cases matching these validation requirements.
• Ensure all other existing project tests continue to compile and pass.

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Note: This issue is completely self-contained and does not block or require any other issues to be resolved.

[nelly439]

@nelly439 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi, I’d like to take on this task. I’m comfortable with Jest, database integration testing, and backend event-processing workflows. I’ll review the existing indexer_metrics_collector implementation and follow the repository’s established patterns to simulate RPC events, verify they are persisted correctly against the database schema, and cover the relevant success and validation cases. I’ll also ensure the existing test suite continues to compile and pass, with no unrelated changes.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @nelly439 to this issue.

[theophilus2530]

@theophilus2530 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

👋 hello, I can see you look out for a near perfect result on this issue, I'll handle it to your taste and a trial would definitely convince you. Thanks in advance.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @theophilus2530 to this issue.

[broda-spendy]

@broda-spendy has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi I'm a software developer and I would love to see this issue.

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

[drips-wave]

Congratulations, @broda-spendy! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

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[drips-wave]

This issue has been completed by @broda-spendy as part of the Stellar Wave Program's 8th Wave 🥳

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