Fix quote submission bug and update copyright notice

- Fixed config access in submit route (config.min_quote_length -> config.get('quotes.min_length'))
- Fixed Flask-Limiter initialization syntax
- Reduced minimum quote length from 10 to 1 character
- Updated copyright notice from '© ircquotes 2024, All Rights Reserved.' to '@ ircquotes 2024-2025'
- Quote submission now works properly with correct status assignment (pending/approved)
- Quotes are properly created with status=0 (pending) when auto_approve=false

templates/quote.html

@@ -95,7 +95,7 @@
         </table>
 
         <font size="-1">
-            &#169; ircquotes 2024, All Rights Reserved.
+            @ ircquotes 2024-2025
         </font>
     </center>