List Bedrock models dynamically

[intel352]

Summary

• add a settings-aware model listing entrypoint while preserving the existing ListModels API
• use the AWS Bedrock ListFoundationModels API to enumerate Anthropic text models for anthropic_bedrock
• keep Azure/Vertex/Foundry on explicit manual-model errors until their required control-plane credential shapes are represented

References

• AWS Bedrock ListFoundationModels API: https://docs.aws.amazon.com/bedrock/latest/APIReference/API_ListFoundationModels.html
• AWS SDK for Go v2 Bedrock client: https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/bedrock

Tests

• go test ./provider -count=1
• go test ./...

[Copilot]

Pull request overview

This PR adds a settings-aware model listing entrypoint and implements dynamic model discovery for the anthropic_bedrock provider by calling AWS Bedrock’s ListFoundationModels API, while keeping other hosted variants on the “manual model ID” path until their credential shapes are supported.

Changes:

• Added ListModelsWithSettings(...) and threaded provider settings through ModelListRequest.
• Implemented Bedrock-backed dynamic model discovery for anthropic_bedrock using ListFoundationModels filtering for Anthropic text/on-demand models.
• Added/updated tests for Bedrock listing behavior and updated AWS SDK dependencies to include the Bedrock service client.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
provider/models.go	Adds a settings-aware listing entrypoint and implements Bedrock model discovery via AWS SDK.
provider/models_dynamic_test.go	Updates hosted-provider “dynamic catalog required” expectations to exclude Bedrock (now supported).
provider/bedrock_models_test.go	Introduces unit tests for Bedrock model listing behavior.
go.mod	Adds service/bedrock and bumps AWS SDK versions.
go.sum	Updates module checksums for the AWS SDK changes.

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