Asynchronously process peek stats

What does this MR do?

This is the first step toward building metrics based on performance bar data.

Whenever new peek data are saved, we schedule a job with some delay which processes these data and builds metrics for each sql query - how long it took and how many times it was called. This should allow us to identify bottlenecks and N+1 issues in our codebase based on all peek data (not only per individual requests).

Related to #271551 (closed)

Screenshots (strongly suggested)

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team