## What changed
- Add `openai.gpt-6-astra` to the Amazon Bedrock model catalog.
- Include its global and US cross-region variants in the Bedrock Runtime catalog.
- Preserve the bundled model metadata while applying Bedrock-specific capabilities and identifiers.
## Testing
- Cover catalog ordering, metadata, context-window overrides, and runtime routing variants.
- Add TUI snapshots for the Bedrock model and reasoning pickers.
GitOrigin-RevId: 25895174f00b85a738da5bb94ade82feaacb474c
## What changed
Group Amazon Bedrock Runtime models by routing variant so every Global model
appears before the US cross-region models, while preserving the base model order
within each group. Update catalog priorities and tests to match the new order.
GitOrigin-RevId: e5a55d61163404172a418cb794b25f3b27f83618
## What changed
- Add the built-in `amazon-bedrock-runtime` provider for regional
`bedrock-runtime` OpenAI-compatible endpoints.
- Use endpoint-specific SigV4 service configuration while preserving bearer
token auth and per-provider AWS profile, region, and transport overrides.
- Provide global and US cross-region GPT-5.6 model variants, prefer global
routing for fallback and background tasks, and disable unsupported web search.
## Testing
- Cover provider configuration and capabilities, endpoint and auth selection,
runtime catalog ordering, model fallback, and web search omission.
GitOrigin-RevId: d158ab74a5768e1b4c61063365a0c06735313322
Celia Chen