feat: optimise events payloads

[christyjacob4]

What does this PR do?

• Ensure the project attribute in the jobs payloads contains only the necessary attributes
• Add a new delete type maintenance to prevent the maintenance worker from triggering multiple jobs for performing maintenance on the same project.

Previously the maintenance worker triggered the following delete jobs for each project

• DELETE_TYPE_SESSIONS
• DELETE_TYPE_EXECUTIONS
• DELETE_TYPE_AUDIT
• DELETE_TYPE_USAGE
• DELETE_TYPE_EXPIRED_TARGETS
  So if you had 1000 projects, it would trigger 5000 jobs and overwhelm the queue.

Now, instead it triggers a single job of type DELETE_TYPE_MAINTENANCE and the deletes worker handles all the deletions. Thereby triggering only 1000 jobs

Test Plan

(Write your test plan here. If you changed any code, please provide us with clear instructions on how you verified your changes work. Screenshots may also be helpful.)

Related PRs and Issues

• (Related PR or issue)

Checklist

• Have you read the Contributing Guidelines on issues?
• If the PR includes a change to an API's metadata (desc, label, params, etc.), does it also include updated API specs and example docs?

[github-actions]

Security Scan Results for PR

Docker Image Scan Results

Package	Version	Vulnerability	Severity
pyc	3.12.7-r0	CVE-2024-12254	HIGH
python3	3.12.7-r0	CVE-2024-12254	HIGH
python3-pyc	3.12.7-r0	CVE-2024-12254	HIGH
python3-pycache-pyc0	3.12.7-r0	CVE-2024-12254	HIGH
rsync	3.3.0-r0	CVE-2024-12084	CRITICAL
rsync	3.3.0-r0	CVE-2024-12085	HIGH
golang.org/x/crypto	v0.26.0	CVE-2024-45337	CRITICAL
golang.org/x/net	v0.28.0	CVE-2024-45338	HIGH

Source Code Scan Results

🎉 No vulnerabilities found!

[github-actions]

✨ Benchmark results

• Requests per second: 1,023
• Requests with 200 status code: 184,209
• P99 latency: 0.178189858

⚡ Benchmark Comparison

Metric	This PR	Latest version
RPS	1,023	1,608
200	184,209	289,440
P99	0.178189858	0.072591008

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