fix: Convert Decimal to float for JSONB serialization in KRS audit

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app.py

@@ -8782,7 +8782,19 @@ def api_krs_audit_trigger():
             audit.prokurenci_count = len(parsed_data.get('prokurenci', []))
             audit.pkd_count = 1 if parsed_data.get('pkd_przewazajacy') else 0
             audit.pkd_count += len(parsed_data.get('pkd_pozostale', []))
-            audit.parsed_data = parsed_data
+
+            # Convert Decimal values to float for JSON serialization
+            def decimal_to_float(obj):
+                from decimal import Decimal
+                if isinstance(obj, Decimal):
+                    return float(obj)
+                elif isinstance(obj, dict):
+                    return {k: decimal_to_float(v) for k, v in obj.items()}
+                elif isinstance(obj, list):
+                    return [decimal_to_float(i) for i in obj]
+                return obj
+
+            audit.parsed_data = decimal_to_float(parsed_data)
             audit.pdf_downloaded_at = datetime.now()
 
             # Update company with parsed data