feat: Improve model identification and deduplication

[IonesioJunior]

Summary

This update enhances model handling by introducing a unique identifier based on full_path and updating deduplication logic across components and data sources to correctly handle models with identical slugs from different owners.

Changes

• Added getModelUniqueId function in model-selector.tsx and use-models.ts to generate a consistent, unique ID for models.
• Updated model comparison logic to use the new unique ID, ensuring proper selection and deduplication.
• Modified endpoint-utils.ts to deduplicate data sources and models based on full_path instead of slug, preventing conflicts between models with the same slug from different owners.

Notes

These changes improve robustness in model selection and ensure data integrity when handling models with overlapping slugs.