feat: configure deep search llm models

mindsearch-config.mjs

@@ -53,6 +53,8 @@ const BUILTIN_SERVICES = Object.freeze([
     enabled: false,
     timeoutMs: 120000,
     priority: 100,
+    llmProviderKeyId: '',
+    llmModel: '',
   },
 ]);
 
@@ -104,6 +106,14 @@ function normalizeService(input = {}, fallback = {}) {
   if (!isValidSearchServiceEndpoint(endpoint)) return null;
   const healthPathValue = String(input.healthPath ?? fallback.healthPath ?? '').trim();
   const healthPath = healthPathValue && /^\/[^\s]{0,255}$/.test(healthPathValue) ? healthPathValue : '';
+  const llmProviderKeyIdValue = String(input.llmProviderKeyId ?? fallback.llmProviderKeyId ?? '').trim();
+  const llmProviderKeyId = /^[a-zA-Z0-9._:-]{1,128}$/.test(llmProviderKeyIdValue)
+    ? llmProviderKeyIdValue
+    : '';
+  const llmModelValue = String(input.llmModel ?? fallback.llmModel ?? '').trim();
+  const llmModel = llmProviderKeyId && !/[\u0000-\u001f\u007f]/.test(llmModelValue)
+    ? llmModelValue.slice(0, 200)
+    : '';
   return {
     id,
     name: String(input.name ?? fallback.name ?? id).trim().slice(0, 80) || id,
@@ -115,6 +125,8 @@ function normalizeService(input = {}, fallback = {}) {
     enabled: bool(input.enabled, bool(fallback.enabled)),
     timeoutMs: boundedNumber(input.timeoutMs, fallback.timeoutMs ?? 8000, 1000, 120000),
     priority: boundedNumber(input.priority, fallback.priority ?? 100, 1, 1000),
+    llmProviderKeyId,
+    llmModel,
   };
 }