fix: increase API request cleanup batch size to 10000

[chrarnoldus]

Summary

• Increase the API request log cleanup batch size from 1,000 to 10,000 rows per request.
• Update the existing cleanup tests to expect the new limit; retain seven-day retention and single-batch behavior.

Validation

• All applicable CI checks passed, including tests, typecheck, lint, formatting, migration checks, builds, and extension E2E tests.
• Automated Kilo Code Review completed with no issues found.
• Tests ran only in CI as requested.
• Local targeted formatting and git diff --check passed. Local focused lint and web typecheck exceeded the environment’s two-minute limit; both passed in CI.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (2 files)

• apps/web/src/app/api/cron/cleanup-api-request-log/route.ts
• apps/web/src/app/api/cron/cleanup-api-request-log/route.test.ts

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_{Review guidance: REVIEW.md from base branch main}