- Updated 151+ model files across 11 providers with accurate release_date and last_updated fields
- Added dates for OpenAI, Azure, Anthropic, Google, Amazon Bedrock, Meta Llama, DeepSeek, xAI, Mistral, Groq, and other providers
- Corrected Llama 4 model dates to accurate release date (2025-04-05)
- Aligned Azure OpenAI models with corresponding OpenAI model dates
- Verified DeepSeek model dates through web research
- All dates follow YYYY-MM-DD format as per schema requirements