🔧 Upgrade to Claude 3.7 Sonnet model

Update Claude AI model to the latest 3.7 version

This change modernizes our AI integration by:

- Updating default model from claude-3-5-sonnet to claude-3-7-sonnet-20250219
  in both code and documentation
- Adding compatibility handling for Claude 3.7 models by skipping the
  token_limit parameter which is unsupported in the newer API
- Updating example configuration references in CONFIG.md to reflect
  the new model version

This upgrade ensures we leverage Claude's latest capabilities while
maintaining backward compatibility.

Author: hyperb1iss

CONFIG.md

@@ -58,7 +58,7 @@ Each provider has its own subtable under `[providers]` with these fields:
 1. OpenAI
    - Default model: "gpt-o4"
 2. Claude
-   - Default model: "claude-3-sonnet-20240320"
+   - Default model: "claude-3-7-sonnet-20250219"
 
 ## Example Configuration File
 
@@ -78,7 +78,7 @@ custom_token_limit = 8000
 
 [providers.claude]
 api_key = "sk-abcdef1234567890"
-model = "claude-3-sonnet-20240320"
+model = "claude-3-7-sonnet-20250219"
 additional_params = { temperature = "0.8" }
 custom_token_limit = 100000
 ```

src/llm_providers/claude.rs

@@ -35,6 +35,10 @@ impl LLMProvider for ClaudeProvider {
 
         // Add additional parameters from the configuration
         for (key, value) in &self.config.additional_params {
+            // Skip token_limit parameter for Claude 3.7 models
+            if key == "token_limit" && self.config.model.contains("claude-3-7") {
+                continue;
+            }
             request_body[key] = serde_json::Value::String(value.clone());
         }
 
@@ -80,7 +84,7 @@ impl LLMProvider for ClaudeProvider {
 pub(super) fn get_metadata() -> ProviderMetadata {
     ProviderMetadata {
         name: "Claude",
-        default_model: "claude-3-5-sonnet-20241022",
+        default_model: "claude-3-7-sonnet-20250219",
         default_token_limit: 150_000,
         requires_api_key: true,
     }

tests/llm_tests.rs

@@ -77,7 +77,7 @@ fn test_get_default_model_for_provider() {
     );
     assert_eq!(
         get_default_model_for_provider(&LLMProviderType::Claude),
-        "claude-3-5-sonnet-20241022"
+        "claude-3-7-sonnet-20250219"
     );
     assert_eq!(
         get_default_model_for_provider(&LLMProviderType::Test),