fix(ai_tools): Update LLM request parameters and improve response handling

- Add `stream: Some(false)` to file search and data catalog tools
- Make `json_schema` optional in `ResponseFormat` serialization
- Enhance logging in search file tool with debug and warning messages
- Improve error context when parsing LLM JSON responses

api/src/utils/clients/ai/litellm/types.rs

@@ -191,6 +191,7 @@ impl Message {
 pub struct ResponseFormat {
     #[serde(rename = "type")]
     pub type_: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub json_schema: Option<Value>,
 }
 

api/src/utils/tools/file_tools/search_data_catalog.rs

@@ -99,7 +99,7 @@ impl SearchDataCatalogTool {
                 content: prompt,
                 name: None,
             }],
-            temperature: Some(0.0),
+            stream: Some(false),
             response_format: Some(ResponseFormat {
                 type_: "json_object".to_string(),
                 json_schema: None,

api/src/utils/tools/file_tools/search_files.rs

@@ -97,7 +97,7 @@ impl SearchFilesTool {
                 content: prompt,
                 name: None,
             }],
-            temperature: Some(0.0),
+            stream: Some(false),
             response_format: Some(ResponseFormat {
                 type_: "json_object".to_string(),
                 json_schema: None,
@@ -116,7 +116,10 @@ impl SearchFilesTool {
             Message::Assistant {
                 content: Some(content),
                 ..
-            } => content,
+            } => {
+                debug!("Received LLM response content: {}", content);
+                content
+            }
             _ => {
                 error!("LLM response missing content");
                 return Err(anyhow::anyhow!("LLM response missing content"));
@@ -125,7 +128,7 @@ impl SearchFilesTool {
 
         // Parse into structured response
         serde_json::from_str(content).map_err(|e| {
-            warn!(error = %e, "Failed to parse LLM response as JSON");
+            warn!(error = %e, content = content, "Failed to parse LLM response as JSON");
             anyhow::anyhow!("Failed to parse search results: {}", e)
         })
     }