fix: Improve automation stop functionality and add debug logging

Stop API improvements:
- Added comprehensive debug logging for stop process
- Changed session status from INACTIVE to STOPPED for clarity
- Better error tracking and result reporting

Automation service improvements:
- Added isRunning check at start of runAutomationCycle to prevent zombie cycles
- Enhanced stop method with better logging and state reset
- Proper config cleanup after database update to prevent residual processes
- More robust interval clearing and state management

These changes should fix the issue where automation appears stopped
but continues running in background.

lib/automation-service-simple.ts

@@ -214,7 +214,11 @@ export class AutomationService {
   }
 
   private async runAutomationCycle(): Promise<void> {
-    if (!this.config) return
+    // Check if automation should still be running
+    if (!this.isRunning || !this.config) {
+      console.log('🛑 Automation cycle stopped - isRunning:', this.isRunning, 'config:', !!this.config)
+      return
+    }
 
     try {
       console.log(`🔍 Running automation cycle for ${this.config.symbol} ${this.config.timeframe}`)
@@ -1310,14 +1314,19 @@ ${validResults.map(r => `• ${r.timeframe}: ${r.analysis?.recommendation} (${r.
 
   async stopAutomation(): Promise<boolean> {
     try {
+      console.log('🛑 Stopping automation service...')
       this.isRunning = false
       
       // Clear the interval if it exists
       if (this.intervalId) {
+        console.log('🛑 Clearing automation interval')
         clearInterval(this.intervalId)
         this.intervalId = null
       }
       
+      // Reset config to prevent any residual processes
+      this.config = null
+      
       // Stop price monitoring
       try {
         await priceMonitorService.stopMonitoring()