Add chat sources and citations

convex/schema.ts

@@ -15,6 +15,15 @@ const chatToolTrace = v.object({
   inputSummary: v.string(),
   resultSummary: v.string(),
 });
+const chatSource = v.object({
+  id: v.string(),
+  title: v.string(),
+  description: v.optional(v.string()),
+});
+const chatCitation = v.object({
+  marker: v.string(),
+  sourceId: v.string(),
+});
 
 export default defineSchema({
   ...authTables,
@@ -201,5 +210,7 @@ export default defineSchema({
     content: v.string(),
     createdAt: v.number(),
     toolTrace: v.optional(v.array(chatToolTrace)),
+    sources: v.optional(v.array(chatSource)),
+    citations: v.optional(v.array(chatCitation)),
   }).index("by_user_session_created", ["userId", "sessionId", "createdAt"]),
 });