Fix pre-existing oracle TypeScript errors

[josephchimebuka]

Summary

• fix the oracle service to instantiate and pass PriceHistoryService into the aggregator correctly
• update the aggregator to use the existing CircuitBreaker API
• fix the remaining contract updater health-check typing issues

Why

These are pre-existing unrelated TypeScript errors outside the issue bundle PR. This keeps that work in a separate cleanup PR.

Testing

• cd oracle && pnpm exec tsc --noEmit

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Hey @josephchimebuka! 👋 It looks like this PR isn't linked to any issue.

If this PR is for one of the issues assigned to you as part of a Wave, please link it to ensure your contribution is tracked properly. You can do this by adding a keyword to the PR description (e.g., Closes #123), or by clicking a button below:

Issue	Title
#34	Feature: Split health check into liveness and readiness probes	Link to this issue
#43	Feature: Make Oracle transaction fee configurable for network congestion	Link to this issue
#47	Fix: Use consistent logging (replace console.error with logger)	Link to this issue
#51	Add GitHub issue and PR templates	Link to this issue

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