feat(radius): enable dynamic client support via SQL nas table

- Activated `dynamic_clients` module to allow loading RADIUS clients dynamically from the database
- Configured SQL query to fetch client secret, shortname, and type based on Packet-Src-IP-Address
- Integrated `dynamic_clients` into the `authorize` section for real-time NAS resolution
- Eliminated need to restart FreeRADIUS when adding new NAS entries

files/sites-available/default

@@ -282,6 +282,7 @@ listen {
 #  Make *sure* that 'preprocess' comes before any realm if you
 #  need to setup hints for the remote radius server
 authorize {
+	dynamic_clients
 	#
 	#  Take a User-Name, and perform some checks on it, for spaces and other
 	#  invalid characters.  If the User-Name appears invalid, reject the