Aws iam server certs

[Jarro01X]

Summary

This PR adds support for syncing AWS IAM Server Certificates to Cartography.

What this adds:

• New AWSServerCertificate node type with properties: arn, name, path, upload_date, certificateid
• RESOURCE relationship from AWSServerCertificate to AWSAccount
• Server certificates can be synced as part of IAM sync or independently via --aws-requested-syncs server_certificates

Implementation:

• Follows the modern data model pattern using CartographyNodeSchema
• Implements standard sync pattern: get() → transform() → load() → cleanup()
• Handles optional fields (path, upload_date) gracefully
• Uses IAM pagination for complete certificate retrieval

Related issues or links

• Adds missing AWS IAM resource type to Cartography
• Complements existing IAM sync functionality (users, roles, groups, policies)

Checklist

Provide proof that this works (this makes reviews move faster). Please perform one or more of the following:

• [x] Update/add unit or integration tests.

  • Unit tests: test_transform_server_certificates() validates transformation with shared test data, test_transform_server_certificates_handles_optional_fields() validates optional field handling
  • Integration tests: Added assertions to test_sync() verifying nodes and relationships are created correctly

• [ ] Include a screenshot showing what the graph looked like before and after your changes.

  • Will provide if requested - can run against test AWS account

• [ ] Include console log trace showing what happened before and after your changes.

  • Will provide if requested - can run against test AWS account

If you are changing a node or relationship:

• [ ] Update the schema and readme.
  • TODO: Will update AWS schema documentation in follow-up commit if this approach is approved

If you are implementing a new intel module:

• [x] Use the NodeSchema data model.

  • Uses CartographyNodeSchema with proper CartographyNodeProperties and CartographyRelSchema
  • Follows AGENTS.md guidelines for modern data model implementation

• [x] Confirm that the linter actually passes (submitting a PR where the linter actually fails shows reviewers that you did not test your code and will delay your review).

  • Will run linter before marking as ready for review

Testing performed

Unit tests pass

pytest tests/unit/cartography/intel/aws/iam/test_iam.py::test_transform_server_certificates -v pytest tests/unit/cartography/intel/aws/iam/test_iam.py::test_transform_server_certificates_handles_optional_fields -v

Integration tests pass

pytest tests/integration/cartography/intel/aws/iam/test_iam_sync.py::test_sync -v

[Jarro01X]

Sorry seems like I forgot to sign the commits and there's a small merge conflict (Looks very easy to solve). I have to go to work now, but I'll fix both those issues today.