fix: improve error handling in GeminiImageService and enhance safe_log_dict for sensitive data

Refactor and enhance various services and utilities

KKP-684 | feat(brand-analysis): Implement brand analysis update endpoint and merge logic for aggregated data

KKP-565 | feat: implement team name generation utility and refactor team name creation in user and invitation services

feat: add NanoBananaPro image generation and credit estimation models, update google-genai dependency to 1.52.0

feat: cache moodboard screenshots and auto-remove stale moodboard images

feat: add image type detection from base64 strings in utility functions

refactor: standardize response handling by returning only data from image generation results

feat: implement BytePlus video generation functionality and webhook handling

KKP-232 | feat: add cairosvg dependency and integrate SVG to PNG conversion in watermark service

feat: enhance GCS image upload with dynamic content type and custom filename generation

feat: repo init