update models in pipeline templates to 4o family (#215)

[dinmukhamedm]

[!IMPORTANT] Update models in seed.json pipeline templates to gpt-4o-mini and gpt-4o.

• Behavior:
  • Update model in frontend/lib/db/seed.json from openai:gpt-3.5-turbo to openai:gpt-4o-mini for several nodes.
  • Update model from openai:gpt-4-turbo to openai:gpt-4o for specific nodes.
• Files:
  • Changes made in frontend/lib/db/seed.json affecting multiple pipeline templates.

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