feat(auth)!: ScadaBridge canonical roles + SoD collapse (Audit→Administrator, AuditReadOnly→Viewer) + config-DB migration (Task 1.7)

Standardize role string VALUES on the canonical vocabulary
(Administrator/Designer/Deployer/Viewer; Operator/Engineer unused here):
  Admin        -> Administrator
  Design       -> Designer
  Deployment   -> Deployer
  Audit        -> Administrator   (COLLAPSE; accepted privilege escalation)
  AuditReadOnly-> Viewer          (COLLAPSE; keeps audit-read, no export)

SoD: OperationalAuditRoles = { Administrator, Viewer },
     AuditExportRoles      = { Administrator }
so Viewer reads the audit log + nav but cannot bulk-export, while
Administrator does both + holds the full admin surface (the documented,
accepted auditor/admin SoD collapse).

Atomic move across every enforcement site:
- Roles constants; AuthorizationPolicies (RequireClaim values + SoD arrays +
  honest XML-doc); RoleMapper Deployer check.
- ManagementActor.GetRequiredRole switch + the hard-coded site-scope
  admin-bypass (now Roles.Administrator at all 6 sites). Site-scoping logic
  is otherwise unchanged.
- DebugStreamHub Administrator/Deployer gates (Deployer kept case-sensitive).
- CentralUI BrowseService/BindingTester Designer guards; LdapMappingForm
  dropdown now offers canonical values (incl. Viewer).
- Config-DB seed (LdapGroupMappings Id 1-4) + EF migration CanonicalizeRoles:
  Id-keyed UpdateData for seed rows + idempotent raw catch-all UPDATEs for
  operator-added rows. Down is lossy on the collapse (documented in-file).
  No pending model changes.

Tests reworked to the collapsed model across Security/CentralUI/
ManagementService/ConfigurationDatabase/Integration suites, incl. explicit
Viewer-reads-not-exports and former-Audit-now-Administrator-escalation cases.

CHANGELOG: BREAKING security note documenting the canonicalization + SoD
collapse.

tests/ZB.MOM.WW.ScadaBridge.IntegrationTests/AuthFlowTests.cs

@@ -64,7 +64,7 @@ public class AuthFlowTests : IClassFixture<ScadaBridgeWebApplicationFactory>
         var token = jwtService.GenerateToken(
             displayName: "Test User",
             username: "testuser",
-            roles: new[] { "Admin", "Design" },
+            roles: new[] { "Administrator", "Designer" },
             permittedSiteIds: null);
 
         Assert.NotNull(token);
@@ -78,8 +78,8 @@ public class AuthFlowTests : IClassFixture<ScadaBridgeWebApplicationFactory>
 
         Assert.Equal("Test User", displayName);
         Assert.Equal("testuser", username);
-        Assert.Contains("Admin", roles);
-        Assert.Contains("Design", roles);
+        Assert.Contains("Administrator", roles);
+        Assert.Contains("Designer", roles);
     }
 
     [Fact]
@@ -91,7 +91,7 @@ public class AuthFlowTests : IClassFixture<ScadaBridgeWebApplicationFactory>
         var token = jwtService.GenerateToken(
             displayName: "Deployer",
             username: "deployer1",
-            roles: new[] { "Deployment" },
+            roles: new[] { "Deployer" },
             permittedSiteIds: new[] { "1", "3" });
 
         var principal = jwtService.ValidateToken(token);