Add AWS Bedrock provider support for chat and embeddings

- Add Bedrock to chat providers with native LiteLLM support
- Add Bedrock to embedding providers

Available models (from AWS docs):

Claude:
- anthropic.claude-opus-4-5-20251101-v1:0 (Opus 4.5)
- anthropic.claude-sonnet-4-5-20250929-v1:0 (Sonnet 4.5)
- anthropic.claude-haiku-4-5-20251001-v1:0 (Haiku 4.5)

Amazon Nova:
- amazon.nova-pro-v1:0, amazon.nova-lite-v1:0
- amazon.nova-2-lite-v1:0, amazon.nova-2-sonic-v1:0

Qwen:
- qwen.qwen3-235b-a22b-2507-v1:0
- qwen.qwen3-coder-480b-a35b-v1:0

Others: MiniMax M2, Mistral Large 3, DeepSeek R1/V3,
Llama 3.3, Titan Embeddings

Auth: Set BEDROCK_API_KEY (new AWS Bedrock API key)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

conf/model_providers.yaml

@@ -64,6 +64,9 @@ chat:
   azure:
     name: OpenAI Azure
     litellm_provider: azure
+  bedrock:
+    name: AWS Bedrock
+    litellm_provider: bedrock
   openrouter:
     name: OpenRouter
     litellm_provider: openrouter
@@ -110,6 +113,9 @@ embedding:
   azure:
     name: OpenAI Azure
     litellm_provider: azure
+  bedrock:
+    name: AWS Bedrock
+    litellm_provider: bedrock
   # TODO: OpenRouter not yet supported by LiteLLM, replace with native litellm_provider openrouter and remove api_base when ready
   openrouter:
     name: OpenRouter

requirements.txt

@@ -45,5 +45,6 @@ soundfile==0.13.1
 imapclient>=3.0.1
 html2text>=2024.2.26
 beautifulsoup4>=4.12.3
+boto3>=1.35.0
 exchangelib>=5.4.3
 pywinpty==3.0.2; sys_platform == "win32"