Use safe date parsing in Monte Carlo connector

[mars-lan]

🤔 Why?

prevExecutionTime returned by getMonitors can be null and must be handled gracefully.

🤓 What?

As titled. Also defensively applied the same tocreatedTime from getAlerts.

🧪 Tested?

Verified against a production instance.

☑️ Checks

• My PR contains actual code changes, and I have updated the version number in pyproject.toml.

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
13526	12124	90%	85%	🟢

New Files

No new covered files...

Modified Files

File	Coverage	Status
metaphor/monte_carlo/extractor.py	90%	🟢
TOTAL	90%	🟢

updated for commit: dba0776 by action🐍

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.63%. Comparing base (8a75908) to head (dba0776).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1057   +/-   ##
=======================================
  Coverage   89.63%   89.63%           
=======================================
  Files         210      210           
  Lines       13526    13526           
=======================================
  Hits        12124    12124           
  Misses       1402     1402           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.