fix: Use /invoices/drafts with proper customer filtering

v1.3.147:
- Changed from /customers/{id}/invoices/sent (404) to /invoices/drafts
- Fetch all drafts, then filter by customer number
- Apply date filter ONLY on customer invoices (fixes bug)
- Proper order: fetch all -> filter customer -> filter date

VERSION

@@ -1 +1 @@
-1.3.146
+1.3.147

app/services/economic_service.py

@@ -458,12 +458,12 @@ class EconomicService:
             logger.info(f"📅 Will filter invoices from {start_date} onwards (13 months for yearly billed items)")
             
             async with aiohttp.ClientSession() as session:
-                # Try customer-specific invoices endpoint first
-                # Format: /customers/{customerNumber}/invoices/sent
+                # Fetch from /invoices/drafts endpoint (main active invoices)
+                # Then filter by customer and date in code
                 all_invoices = []
                 
-                logger.info(f"📋 Fetching invoices for customer {customer_number} from customer-specific endpoint")
-                endpoint = f"{self.api_url}/customers/{customer_number}/invoices/sent"
+                logger.info(f"📋 Fetching all draft invoices from e-conomic")
+                endpoint = f"{self.api_url}/invoices/drafts"
                 
                 try:
                     # Pagination: Keep fetching until no more pages
@@ -492,26 +492,38 @@ class EconomicService:
                                 page += 1
                             else:
                                 error_text = await response.text()
-                                logger.warning(f"⚠️ Customer-specific endpoint returned {response.status}: {error_text[:200]}")
+                                logger.warning(f"⚠️ Endpoint returned {response.status}: {error_text[:200]}")
                                 break
                 except Exception as e:
-                    logger.error(f"❌ Error fetching from customer endpoint: {e}")
+                    logger.error(f"❌ Error fetching invoices: {e}")
+                
+                logger.info(f"✅ Found {len(all_invoices)} total invoices in e-conomic")
                 
                 if not all_invoices:
+                    logger.warning(f"⚠️ No invoices found in e-conomic")
+                    return []
+                
+                # Filter invoices for this customer
+                customer_invoices = [
+                    inv for inv in all_invoices
+                    if inv.get('customer', {}).get('customerNumber') == customer_number
+                ]
+                
+                logger.info(f"📊 Filtered to {len(customer_invoices)} invoices for customer {customer_number}")
+                
+                if not customer_invoices:
                     logger.warning(f"⚠️ No invoices found for customer {customer_number}")
                     return []
                 
-                logger.info(f"✅ Found {len(all_invoices)} invoices for customer {customer_number}")
-                
                 # Debug: log response structure
-                if all_invoices:
-                    logger.info(f"🔍 [API] First invoice structure keys: {list(all_invoices[0].keys())}")
-                    logger.info(f"🔍 [API] First invoice date: {all_invoices[0].get('date')}")
+                if customer_invoices:
+                    logger.info(f"🔍 [API] First invoice structure keys: {list(customer_invoices[0].keys())}")
+                    logger.info(f"🔍 [API] First invoice date: {customer_invoices[0].get('date')}")
                 
-                # Apply date filter (13 months back)
+                # Apply date filter (13 months back) on customer invoices only
                 from dateutil.parser import parse as parse_date
                 filtered_by_date = []
-                for inv in all_invoices:
+                for inv in customer_invoices:
                     invoice_date_str = inv.get('date')
                     if invoice_date_str:
                         try: