*: kurtosis smoke test workflow

[pinebit]

Add a manually-triggered workflow that deploys Kurtosis test clusters to AWS,
lets them run for 60 minutes, then checks Grafana alerts fired during the run
window. This validates that the latest main branch Charon image runs without
triggering alerts under sustained conditions.

The workflow:

• Deploys clusters via kurtosis-aws-runner with CHARON_VERSION override
• Uses --lifetime 60m for EC2 auto-termination (no explicit teardown needed)
• Checks alerts in a 40-minute soak window (deploy+15m to deploy+55m),
  skipping the first 2 epochs and last 5 minutes of shutdown noise
• Produces a report.txt artifact (uploaded even on failure)
• Fails if any alerts fired during the soak window

category: feature
ticket: none

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.43%. Comparing base (c6c10cd) to head (58e0255).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4420      +/-   ##
==========================================
+ Coverage   56.38%   56.43%   +0.04%     
==========================================
  Files         244      244              
  Lines       32518    32518              
==========================================
+ Hits        18336    18351      +15     
+ Misses      11838    11829       -9     
+ Partials     2344     2338       -6     

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[sonarqubecloud]

Quality Gate passed

Issues
3 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
3.4% Duplication on New Code

See analysis details on SonarQube Cloud