refactor: scrub residual ScadaLink refs → ScadaBridge (env vars, config keys, assembly name, SQL login)

Renames the 13 SCADALINK_* runtime env vars → SCADABRIDGE_*, the ScadaLink__
.NET config keys → ScadaBridge__, the stale ScadaLink.Host.exe assembly name
→ ZB.MOM.WW.ScadaBridge.Host.exe, the scadalink_app SQL login → scadabridge_app,
and residual identifiers/comments/docs. Migration records (prior rename
tooling/design, DB-rename helper, this scrub script) carved out.

Adds tools/scrub-scadalink-refs.sh.

src/ZB.MOM.WW.ScadaBridge.Host/Program.cs

@@ -22,9 +22,9 @@ using ZB.MOM.WW.ScadaBridge.TemplateEngine;
 using ZB.MOM.WW.ScadaBridge.Transport;
 using Serilog;
 
-// SCADALINK_CONFIG determines which role-specific config to load (Central or Site)
+// SCADABRIDGE_CONFIG determines which role-specific config to load (Central or Site)
 // DOTNET_ENVIRONMENT/ASPNETCORE_ENVIRONMENT stay as "Development" for dev tooling (static assets, EF migrations, etc.)
-var scadabridgeConfig = Environment.GetEnvironmentVariable("SCADALINK_CONFIG")
+var scadabridgeConfig = Environment.GetEnvironmentVariable("SCADABRIDGE_CONFIG")
     ?? Environment.GetEnvironmentVariable("DOTNET_ENVIRONMENT")
     ?? "Production";
 

src/ZB.MOM.WW.ScadaBridge.Host/Properties/launchSettings.json

@@ -9,7 +9,7 @@
       "environmentVariables": {
         "DOTNET_ENVIRONMENT": "Development",
         "ASPNETCORE_ENVIRONMENT": "Development",
-        "SCADALINK_CONFIG": "Central"
+        "SCADABRIDGE_CONFIG": "Central"
       }
     },
     "ScadaBridge Site": {
@@ -19,7 +19,7 @@
       "environmentVariables": {
         "DOTNET_ENVIRONMENT": "Development",
         "ASPNETCORE_ENVIRONMENT": "Development",
-        "SCADALINK_CONFIG": "Site"
+        "SCADABRIDGE_CONFIG": "Site"
       }
     }
   }

src/ZB.MOM.WW.ScadaBridge.Host/appsettings.Central.json

@@ -20,7 +20,7 @@
     },
     "_secrets": "Host-003: Secrets are NOT committed in this file. Supply them via environment variables, which the Host's configuration builder (AddEnvironmentVariables) overlays over this file. Required: ScadaBridge__Database__ConfigurationDb, ScadaBridge__Security__LdapServiceAccountPassword, ScadaBridge__Security__JwtSigningKey. The ${...} placeholders below are intentionally non-functional and must be overridden per environment.",
     "Database": {
-      "ConfigurationDb": "${SCADALINK_CONFIGURATIONDB_CONNECTION_STRING}"
+      "ConfigurationDb": "${SCADABRIDGE_CONFIGURATIONDB_CONNECTION_STRING}"
     },
     "Security": {
       "LdapServer": "localhost",
@@ -29,8 +29,8 @@
       "AllowInsecureLdap": true,
       "LdapSearchBase": "dc=scadabridge,dc=local",
       "LdapServiceAccountDn": "cn=admin,dc=scadabridge,dc=local",
-      "LdapServiceAccountPassword": "${SCADALINK_LDAP_SERVICE_ACCOUNT_PASSWORD}",
-      "JwtSigningKey": "${SCADALINK_JWT_SIGNING_KEY}",
+      "LdapServiceAccountPassword": "${SCADABRIDGE_LDAP_SERVICE_ACCOUNT_PASSWORD}",
+      "JwtSigningKey": "${SCADABRIDGE_JWT_SIGNING_KEY}",
       "JwtExpiryMinutes": 15,
       "IdleTimeoutMinutes": 30
     },