fix: set temperature to 0.0 for deterministic routing

Changed routing model temperature from 0.1 to 0.0 to ensure completely
deterministic JSON output from LLM. This eliminates variability in the
structured response format that was causing intermittent parsing errors.

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

Author: scotty595

src/config/llm-models.ts

@@ -141,7 +141,7 @@ export const MODEL_CONFIGS: Record<string, ModelConfig> = {
     provider: 'groq',
     baseUrl: 'https://api.groq.com/openai/v1/chat/completions',
     supportsJsonSchema: true,
-    defaultTemperature: 0.1,
+    defaultTemperature: 0.0,
     maxTokens: 1000,
     description: 'GPT OSS 20B via Groq. Good for structured output.',
   },
@@ -150,7 +150,7 @@ export const MODEL_CONFIGS: Record<string, ModelConfig> = {
     provider: 'groq',
     baseUrl: 'https://api.groq.com/openai/v1/chat/completions',
     supportsJsonSchema: true,
-    defaultTemperature: 0.1,
+    defaultTemperature: 0.0,
     maxTokens: 2000,
     description: 'GPT OSS 120B via Groq. Better reasoning and structured output.',
   },
@@ -189,7 +189,7 @@ export function getModelConfig(modelId: string): ModelConfig {
     provider,
     baseUrl,
     supportsJsonSchema,
-    defaultTemperature: 0.1,
+    defaultTemperature: 0.0,
     maxTokens: 1000,
     description: `Unknown model - inferred ${provider} provider`,
   };

src/services/drift/operations/classify-route/helpers/call-llm.ts

@@ -153,7 +153,7 @@ async function callGroq(
 
   // Only add temperature if model supports it
   if (supportsTemperature) {
-    requestParams.temperature = defaultTemperature ?? 0.1;
+    requestParams.temperature = defaultTemperature ?? 0.0;
   }
 
   // Add strict JSON schema if supported, otherwise use json_object mode
@@ -252,7 +252,7 @@ async function callOpenAI(
 
   // Only add temperature if model supports it
   if (supportsTemperature) {
-    body.temperature = defaultTemperature ?? 0.1;
+    body.temperature = defaultTemperature ?? 0.0;
   }
 
   // Use routing-only or routing+facts schema based on flag