Fix automation startup issue and add AI learning documentation

- Fixed foreign key constraint violation in automation service
- Added user upsert to ensure user exists before creating automation session
- Enhanced error reporting in automation start API
- Added comprehensive AI learning system documentation
- Automation now starts successfully in simulation mode

lib/automation-service-simple.ts

@@ -58,6 +58,19 @@ export class AutomationService {
       
       console.log(`🤖 Starting automation for ${config.symbol} ${config.timeframe} in ${config.mode} mode`)
       
+      // Ensure user exists in database
+      await prisma.user.upsert({
+        where: { id: config.userId },
+        update: {},
+        create: {
+          id: config.userId,
+          email: `${config.userId}@example.com`,
+          name: config.userId,
+          createdAt: new Date(),
+          updatedAt: new Date()
+        }
+      })
+      
       // Create automation session in database
       await prisma.automationSession.create({
         data: {