Add support for ad beacon reporting

[siddharth-sahoo]

Description

Add support for ad beacon reporting in Protected Audience using the Fenced Frames Ads Reporting API. Register some example beacons, trigger these beacons from the ad-frame, and integrate the Attribution Reporting API over these ad beacons.

Affected services

• [ ] Home
• [ ] News
• [ ] Shop
• [ ] Travel
• [x] DSP
• [x] SSP
• [ ] ALL

Changelog:

• Return randomized values for source event ID and debug keys in Attribution Reporting helper library.
• Add a new endpoint to accept direct event-level logging from the browser and temporarily store the event report in memory that can be looked up via another endpoint.
• Add attribution reporting response headers to event-level logging requests if the request is eligible. Also redirect the request with context to another party depending on URL query parameter.
• Store event-level and aggregate reports in memory in a consistent structure that categorizes the report and also stores the server timestamp on receipt.
• Add new well known endpoints to accept ARA debug and regular event-level reports.
• Update bidding logic to register for the 2 automatic beacons and a custom beacon.

[Seburan]

please make sure you run code linting with pre-commit on your machine before submitting PR.

pre-commit install

you can also run pre-commit on all the files manually before committing your changes :

pre-commit run --all-files