Add Prometheus Metric for Event Ingestion Rate

[DokaIzk]

Title: feat: add Prometheus gauge for current event ingestion rate (events/sec)

Complexity: trivial
Time Estimate: 4-5 hours
Skills: Prometheus, metrics

Description:
Track how many events per second are being ingested:

• Create Prometheus gauge metric
• Update gauge in ingest task
• Expose via /metrics endpoint

Acceptance Criteria:

• Gauge created and incremented per event
• Metrics endpoint exposes gauge
• Tests verify metric updates

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[probablyABug]

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

hi, i would like to work on this.

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[eliassmthl-collab]

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

Hello maintainer, I can handle this issue.

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[tecmalik]

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

Hi

Please assign me this task. I’ll add a Prometheus metric for event ingestion rate, update it during ingestion, expose it through the metrics endpoint, and add tests to verify metric updates.

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[blockchainrafik]

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

Good day maintainer,
I will like to work on this issue,
With years of experience in software engineering, Getting this issue fixed without regression is assured.
ETA: 5hrs

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[Biokes]

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

Good day maintainer,
I will like to work on this issue,
With years of experience in software engineering, Getting this issue fixed without regression is assured.

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