SK-246 // add transform option to skctl export and snapshot

[ogorman89]

Description and Rationale

• feat: transform trace on export via a SKEL file
• previous art SK-246 // transform trace on export via a SKEL file #252 / SK-246 // transform trace on export #253

How

• add transform flag to export in CLI --transform <file.skel> for skctl export
• add a transform option to the ExportRequest object
• modify collect_events to apply an optional SKEL transformation if specified on the ExportRequest object

Test Steps

• I copied one of our existing collect_events tests and modified it to just create some events with named deployments and then wrote a simple delete SKEL command to remove one of them and assert its removal.
• for manual testing I build a cluster with isengard, created some deployments and then ran exports with and without SKEL transformations to compare

My test deployments were just a small-service, medium-service, and large-service

The simple SKEL I am using to test is a test.skel file with; which should delete all events related to the large-service:
delete(metadata.name == "large-service");

Without transformation
(note I'm removing default from --excluded-namespaces since thats where my test pods where deployed.

./.build/skctl export --excluded-namespaces cert-manager,kube-public,kube-node-lease,kube-system,local-path-storage,monitoring,simkube -o first.sktrace

With transformation

./.build/skctl export --excluded-namespaces cert-manager,kube-public,kube-node-lease,kube-system,local-path-storage,monitoring,simkube -o second.sktrace --transform test.skel

I inspected all the results with skctl xray

Other Notes

• N/A

• [ X ] I certify that this PR does not contain any code that has been generated with GitHub Copilot or any other AI-based code generation tool, in accordance with this project's policies.

[linear-code]

SK-246

[codecov]

Codecov Report

❌ Patch coverage is 73.33333% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.25%. Comparing base (9525b70) to head (d4d8f5f).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
sk-cli/src/export.rs	0.00%	8 Missing ⚠️
sk-cli/src/transform.rs	0.00%	2 Missing ⚠️
sk-skel/src/lib.rs	80.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #260      +/-   ##
==========================================
+ Coverage   79.00%   79.25%   +0.25%     
==========================================
  Files          61       61              
  Lines        3986     4010      +24     
==========================================
+ Hits         3149     3178      +29     
+ Misses        837      832       -5     

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