feat(developers): fix approval webhook flow and add ticket parsing service

Change approve endpoint from int to string ticketId to match SilverDESK
GUIDs. Remove body parameter requirement so the endpoint works as a
webhook target. Add DeveloperTicketParsingService to fetch and parse
applicant details from ticket descriptions. Remove redundant ticket
status update from ProvisioningService since SilverDESK action engine
now handles SetStatus/AddNote/AddReply steps.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

BlazorApp/appsettings.json

@@ -18,5 +18,5 @@
     "BaseUrl": "https://mail.silverlined.uk",
     "ApiKey": ""
   },
-  "AdminApiKey": ""
+  "AdminApiKey": "aawb2MHblbfmqdhcS7Xp2/ibQOUbUE1BDoqdJOu0bjM="
 }