Enable probability predictions by default for SVC

[Irozuku]

Summary

This pull request updates the Support Vector Classifier (SVC) implementation to always enable probability prediction by default. The configurable probability option has been removed to simplify the API, ensure consistent availability of probability outputs, and support metrics that require model-predicted probabilities for their calculation.

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Type of Change

Check all that apply like this [x]:

• Backend change
• Frontend change
• CI / Workflow change
• Build / Packaging change
• Bug fix
• Documentation

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Changes (by file)

Briefly list the important modified files and what was done.

• DashAI/back/models/scikit_learn/svc.py:
  • Removed the probability field from SVCSchema so it can no longer be user-configured.
  • Updated the SVC model initialization to always set probability=True, ensuring probability predictions are available for metric computation.

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Testing (optional)

• Confirm that metrics requiring probability outputs (e.g., ROC AUC, log loss) compute correctly.
• Ensure that removing the probability field from the schema does not break existing configurations.