* fix(bedrock/cohere): wrap embedding_types as list in map_openai_params
Bedrock Cohere expects embedding_types as a JSON array but
encoding_format was passed through as a raw string, causing:
Malformed input request: #/embedding_types: expected type: JSONArray, found: String
* test(bedrock/cohere): assert embedding_types is sent as JSON array
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Co-authored-by: Ishaan Jaffer <ishaanjaffer0324@gmail.com>
Bedrock multimodal embedding models (Titan and Nova) were being costed
using the per-token text rate instead of the correct flat per-image rate
($0.00006/image). The pricing data was correct but never applied because
image_count was never populated in prompt_tokens_details.
Pass batch_data to Titan/Nova response transformers so they can count
image inputs and set PromptTokensDetailsWrapper(image_count=N) on Usage,
mirroring the existing Vertex AI pattern from PR #9623. Also fix the
text_tokens fallback in generic_cost_per_token to not override
text_tokens=0 when image_count > 0 (image-only requests).
- Test encoding_format='float' parameter mapping and response handling
- Test encoding_format='base64' parameter mapping to binary format
- Verify parameter transformation and response processing
- Mock AWS API responses for both float and binary formats
- Ensure OpenAI compatibility with new encoding_format support
* add support of bearer token for bedrock integration
* fix linting issue
* fix type checking issue
* reoder arguments to address type checking issue
* switch to use get_secret_str to fetch env variable
Co-authored-by: 0x-fang <fanggong@amazon.com>
