feat(request-details): implement observability settings and enhance request detail tracking

- Added new observability settings in the dashboard for max records, batch size, flush interval, and max JSON size.
- Introduced `extractRequestConfig` function to capture full request configurations.
- Enhanced error handling by saving detailed request information on failures.
- Updated usage tracking to include new token metrics.
- Modified streaming functions to support detailed content and reasoning tracking.

src/lib/localDb.js

@@ -50,7 +50,11 @@ const defaultData = {
   settings: {
     cloudEnabled: false,
     stickyRoundRobinLimit: 3,
-    requireLogin: true
+    requireLogin: true,
+    observabilityMaxRecords: 1000,
+    observabilityBatchSize: 20,
+    observabilityFlushIntervalMs: 5000,
+    observabilityMaxJsonSize: 1024
   },
   pricing: {} // NEW: pricing configuration
 };
@@ -67,6 +71,10 @@ function cloneDefaultData() {
       cloudEnabled: false,
       stickyRoundRobinLimit: 3,
       requireLogin: true,
+      observabilityMaxRecords: 1000,
+      observabilityBatchSize: 20,
+      observabilityFlushIntervalMs: 5000,
+      observabilityMaxJsonSize: 1024
     },
     pricing: {},
   };