refactor: Remove SRA integration (no public API available)

The SRA (Solicitors Regulation Authority) does not provide a public REST API.
Their register is only accessible via their website. Removed all SRA-related
code and added ApiTester tool for testing remaining integrations.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/RealCV.Web/appsettings.json

@@ -19,8 +19,8 @@
     "ContainerName": "cv-uploads"
   },
   "FcaRegister": {
-    "ApiKey": "",
-    "Email": ""
+    "ApiKey": "9ae1aee51e5c717a1135775501c89075",
+    "Email": "peter.foster@ukdataservices.co.uk"
   },
   "GitHub": {
     "PersonalAccessToken": ""