Incomplete cron expresion validation in scheduler

[anagperal]

📌 References

• Issue: Closes #869bvjk4e Incomplete cron expresion validation in scheduler

📝 Implementation

• Fix validation for cron expression in scheduler

📹 Screenshots/Screen capture

🔥 Is there anything the reviewer should know to test it?

Test different invalid cron expressions:

• 0 0 /2 * * *

•                   0 0 */2 * * *
  

•   0 0 1/2 * * *          
  

📑 Others

• Any change in the GUI library? If so, what branch/PR?

• Any change in the D2 Api? If so, what branch/PR?

[ifoche]

Task linked: CU-869bvjk4e Incomplete cron expresion validation in scheduler

[bundlemon]

BundleMon

No change in files bundle size

Groups updated (1)

Status	Path	Size	Limits
✅	Build Folder ./**/*	2.78MB (+54B 0%)	+20%

Final result: ✅

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