- Added support for claude-sonnet-4-5 (Claude 3.5 Sonnet) in Anthropic provider's 1M context check
- Added Claude 3.5 Sonnet model IDs to BEDROCK_1M_CONTEXT_MODEL_IDS array
- Added comprehensive tests for both Anthropic and Bedrock providers
- Fixes issue where Claude 3.5 Sonnet showed 200K instead of 1M tokens when 1M context was enabled
Fixes#8417