docs(config): add timeout and max_retries examples for model providers (#1549)

Added explicit timeout and retry configurations to `config.example.yaml` to help users properly configure their model connections.

Since different LangChain provider classes use different parameter names, this update maps the correct arguments for each:
- ChatOpenAI (OpenAI, MiniMax, Novita, OpenRouter): added `request_timeout` and `max_retries`
- ChatAnthropic (Claude): added `default_request_timeout` and `max_retries`
- ChatGoogleGenerativeAI (Gemini): added `timeout` and `max_retries`
- PatchedChatDeepSeek (Doubao, DeepSeek, Kimi): added `timeout` and `max_retries`

Default example values are set to 600.0 seconds for timeouts and 2 for max retries.

config.example.yaml

@@ -41,6 +41,8 @@ models:
   #   model: doubao-seed-1-8-251228
   #   api_base: https://ark.cn-beijing.volces.com/api/v3
   #   api_key: $VOLCENGINE_API_KEY
+  #   timeout: 600.0
+  #   max_retries: 2
   #   supports_thinking: true
   #   supports_vision: true
   #   supports_reasoning_effort: true
@@ -55,6 +57,8 @@ models:
   #   use: langchain_openai:ChatOpenAI
   #   model: gpt-4
   #   api_key: $OPENAI_API_KEY # Use environment variable
+  #   request_timeout: 600.0
+  #   max_retries: 2
   #   max_tokens: 4096
   #   temperature: 0.7
   #   supports_vision: true # Enable vision support for view_image tool
@@ -65,6 +69,8 @@ models:
   #   use: langchain_openai:ChatOpenAI
   #   model: gpt-5
   #   api_key: $OPENAI_API_KEY
+  #   request_timeout: 600.0
+  #   max_retries: 2
   #   use_responses_api: true
   #   output_version: responses/v1
   #   supports_vision: true
@@ -75,6 +81,8 @@ models:
   #   use: langchain_anthropic:ChatAnthropic
   #   model: claude-3-5-sonnet-20241022
   #   api_key: $ANTHROPIC_API_KEY
+  #   default_request_timeout: 600.0
+  #   max_retries: 2
   #   max_tokens: 8192
   #   supports_vision: true  # Enable vision support for view_image tool
   #   when_thinking_enabled:
@@ -87,6 +95,8 @@ models:
   #   use: langchain_google_genai:ChatGoogleGenerativeAI
   #   model: gemini-2.5-pro
   #   gemini_api_key: $GEMINI_API_KEY
+  #   timeout: 600.0
+  #   max_retries: 2
   #   max_tokens: 8192
   #   supports_vision: true
 
@@ -101,6 +111,8 @@ models:
   #   model: google/gemini-2.5-pro-preview   # model name as expected by your gateway
   #   api_key: $GEMINI_API_KEY
   #   base_url: https://<your-openai-compat-gateway>/v1
+  #   request_timeout: 600.0
+  #   max_retries: 2
   #   max_tokens: 16384
   #   supports_thinking: true
   #   supports_vision: true
@@ -115,6 +127,8 @@ models:
   #   use: deerflow.models.patched_deepseek:PatchedChatDeepSeek
   #   model: deepseek-reasoner
   #   api_key: $DEEPSEEK_API_KEY
+  #   timeout: 600.0
+  #   max_retries: 2
   #   max_tokens: 8192
   #   supports_thinking: true
   #   supports_vision: false  # DeepSeek V3 does not support vision
@@ -130,6 +144,8 @@ models:
   #   model: kimi-k2.5
   #   api_base: https://api.moonshot.cn/v1
   #   api_key: $MOONSHOT_API_KEY
+  #   timeout: 600.0
+  #   max_retries: 2
   #   max_tokens: 32768
   #   supports_thinking: true
   #   supports_vision: true  # Check your specific model's capabilities
@@ -147,6 +163,8 @@ models:
   #   model: deepseek/deepseek-v3.2
   #   api_key: $NOVITA_API_KEY
   #   base_url: https://api.novita.ai/openai
+  #   request_timeout: 600.0
+  #   max_retries: 2
   #   max_tokens: 4096
   #   temperature: 0.7
   #   supports_thinking: true
@@ -165,6 +183,8 @@ models:
   #   model: MiniMax-M2.5
   #   api_key: $MINIMAX_API_KEY
   #   base_url: https://api.minimax.io/v1
+  #   request_timeout: 600.0
+  #   max_retries: 2
   #   max_tokens: 4096
   #   temperature: 1.0  # MiniMax requires temperature in (0.0, 1.0]
   #   supports_vision: true
@@ -175,6 +195,8 @@ models:
   #   model: MiniMax-M2.5-highspeed
   #   api_key: $MINIMAX_API_KEY
   #   base_url: https://api.minimax.io/v1
+  #   request_timeout: 600.0
+  #   max_retries: 2
   #   max_tokens: 4096
   #   temperature: 1.0  # MiniMax requires temperature in (0.0, 1.0]
   #   supports_vision: true
@@ -188,6 +210,8 @@ models:
   #   model: MiniMax-M2.7
   #   api_key: $MINIMAX_API_KEY
   #   base_url: https://api.minimaxi.com/v1
+  #   request_timeout: 600.0
+  #   max_retries: 2
   #   max_tokens: 4096
   #   temperature: 1.0  # MiniMax requires temperature in (0.0, 1.0]
   #   supports_vision: true
@@ -198,6 +222,8 @@ models:
   #   model: MiniMax-M2.5-highspeed
   #   api_key: $MINIMAX_API_KEY
   #   base_url: https://api.minimaxi.com/v1
+  #   request_timeout: 600.0
+  #   max_retries: 2
   #   max_tokens: 4096
   #   temperature: 1.0  # MiniMax requires temperature in (0.0, 1.0]
   #   supports_vision: true
@@ -211,6 +237,8 @@ models:
   #   model: google/gemini-2.5-flash-preview
   #   api_key: $OPENAI_API_KEY
   #   base_url: https://openrouter.ai/api/v1
+  #   request_timeout: 600.0
+  #   max_retries: 2
   #   max_tokens: 8192
   #   temperature: 0.7