Add structured log for alert check run after each price snapshot update with match count

[Chucks1093]

Summary

After every price snapshot update the server checks all registered alerts for that creator. A structured log showing how many alerts were evaluated and how many triggered gives operators visibility into alert activity without querying the database.

Scope

• Emit a structured debug log after each alert check run with fields: creator_id, alerts_evaluated, alerts_triggered, new_price, checked_at
• Log fires even when no alerts are registered (with alerts_evaluated: 0)
• Log is debug level when no alerts triggered, info level when one or more triggered

Acceptance Criteria

• Log emitted after every alert check run
• All five fields present
• Debug level when no alerts triggered
• Info level when one or more alerts triggered

ETA: 12 hours

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Coordinate on Telegram

[heymide]

I can take this on. I've gone through the details and will provide a well-tested solution aligned with the project standards.

[heymide]

I can take this on. I've gone through the details and will provide a well-tested solution aligned with the project standards.

[Menjay7]

Hi! I came across this issue and would love to work on it. I have experience with similar tasks and I'm confident I can investigate, implement a clean solution, and thoroughly test it before submitting a PR. If the issue is still open, I would appreciate it if you could assign it to me. Thank you!

[MarcusDavidG]

I can handle this issue and will like to work on it, Please assign thank you.

[Digitalasu]

Hi, I'd like to work on this issue. I've gone through the description and acceptance criteria and I'm confident I can deliver it. I'll make sure every acceptance criterion is met and submit a clean, tested PR. Please assign it to me.

[OpensrcLord]

Hello @maintainer, I understand the expected outcome and would love to work on this. I'll provide a solution that satisfies the acceptance criteria.