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.

tests/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Tests/DesignTimeDbContextFactoryTests.cs

@@ -4,7 +4,7 @@ namespace ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Tests;
 
 public class DesignTimeDbContextFactoryTests : IDisposable
 {
-    private const string EnvVar = "SCADALINK_DESIGNTIME_CONNECTIONSTRING";
+    private const string EnvVar = "SCADABRIDGE_DESIGNTIME_CONNECTIONSTRING";
     private readonly string? _originalEnv;
 
     public DesignTimeDbContextFactoryTests()

tests/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Tests/Migrations/MsSqlMigrationFixture.cs

@@ -33,7 +33,7 @@ public sealed class MsSqlMigrationFixture : IDisposable
     private const string DefaultAdminConnectionString =
         "Server=localhost,1433;User Id=sa;Password=ScadaBridge_Dev1#;TrustServerCertificate=true;Encrypt=false;Connect Timeout=3";
 
-    private const string AdminEnvVar = "SCADALINK_MSSQL_TEST_CONN";
+    private const string AdminEnvVar = "SCADABRIDGE_MSSQL_TEST_CONN";
 
     public string DatabaseName { get; }