[Snyk] Security upgrade python from 3.10.0rc1-slim to 3.13.0a6-slim

[dradX]

This PR was automatically created by Snyk using the credentials of a real user.

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image.

Changes included in this PR

• ruleserver/app/Dockerfile

We recommend upgrading to python:3.13.0a6-slim, as this image has only 50 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Some of the most important vulnerabilities in your base image include:

Severity	Priority Score / 1000	Issue	Exploit Maturity
	714	Directory Traversal SNYK-DEBIAN11-DPKG-2847942	No Known Exploit
	714	Buffer Overflow SNYK-DEBIAN11-GLIBC-2340922	No Known Exploit
	829	Out-of-bounds Write SNYK-DEBIAN11-GLIBC-5927133	Mature
	829	Out-of-bounds Write SNYK-DEBIAN11-GLIBC-5927133	Mature
	714	Out-of-bounds Read SNYK-DEBIAN11-PCRE2-2808704	No Known Exploit

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[sonarqubecloud]

Quality Gate failed

Failed conditions
2 Security Hotspots
D Maintainability Rating on New Code (required ≥ A)

See analysis details on SonarCloud

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