Switch image generation from Vertex AI Imagen 3 to Flux

[ThatXliner]

Summary

Currently using Google Vertex AI Imagen 3 for AI image generation in the scraper.

Proposal

Switch to Flux for image generation in the future.

Current Implementation

• apps/scraper/src/utils/ai/image-generation.ts uses vertexProvider.image('imagen-3.0-generate-001')
• Integrated via @ai-sdk/google-vertex

Notes

• Evaluate Flux API options (Replicate, fal.ai, BFL direct)
• Consider cost comparison
• Test image quality for editorial/news imagery use case