Refactor SNCF processor and add Revolut aggregator

- Fix SNCF NET PAYÉ EN EUROS extraction to correctly parse MENSUEL line
- Extract month/year from PDF content instead of filename
- Add new Revolut CSV processor to aggregate account statements
- Organize Revolut data files into data/csv/revolut/
- Clean up redundant scripts and reports

scripts/process_bourso.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 
 import re
 import csv
@@ -67,7 +68,7 @@ def process_bourso_statement(file_path, output_csv=False, output_dir='../../outp
     
     # Output CSV if requested
     if output_csv:
-        csv_file = os.path.join(output_dir, os.path.splitext(os.path.basename(file_path))[0] + '_transactions.csv')
+        csv_file = os.path.join(output_dir, 'boursobank_all_transactions.csv')
         os.makedirs(output_dir, exist_ok=True)
         with open(csv_file, 'w', newline='', encoding='utf-8') as csvfile:
             fieldnames = ['Date', 'Description', 'Category', 'Debit', 'Credit', 'Value Date']