Fix auth, Bootstrap, Blazor nav, LDAP, and deployment pipeline for working Central UI

Bootstrap served locally with absolute paths and <base href="/">.
LDAP auth uses search-then-bind with service account for GLAuth compatibility.
CookieAuthenticationStateProvider reads HttpContext.User instead of parsing JWT.
Login/logout forms opt out of Blazor enhanced nav (data-enhance="false").
Nav links use absolute paths; seed data includes Design/Deployment group mappings.
DataConnections page loads all connections (not just site-assigned).
Site appsettings configured for Test Plant A; Site registers with Central on startup.
DeploymentService resolves string site identifier for Akka routing.
Instances page gains Create Instance form.

src/ScadaLink.Host/appsettings.Site.json

@@ -2,14 +2,14 @@
   "ScadaLink": {
     "Node": {
       "Role": "Site",
-      "NodeHostname": "site-a-node1",
-      "SiteId": "SiteA",
+      "NodeHostname": "localhost",
+      "SiteId": "site-a",
       "RemotingPort": 8082
     },
     "Cluster": {
       "SeedNodes": [
-        "akka.tcp://scadalink@site-a-node1:8082",
-        "akka.tcp://scadalink@site-a-node2:8082"
+        "akka.tcp://scadalink@localhost:8082",
+        "akka.tcp://scadalink@localhost:8083"
       ],
       "SplitBrainResolverStrategy": "keep-oldest",
       "StableAfter": "00:00:15",
@@ -18,7 +18,8 @@
       "MinNrOfMembers": 1
     },
     "Database": {
-      "SiteDbPath": "./data/scadalink.db"
+      "SiteDbPath": "./data/scadalink.db",
+      "ConfigurationDb": "Server=localhost,1433;Database=ScadaLinkConfig;User Id=scadalink_app;Password=ScadaLink_Dev1#;TrustServerCertificate=true"
     },
     "DataConnection": {
       "ReconnectInterval": "00:00:05",
@@ -30,6 +31,7 @@
       "ReplicationEnabled": true
     },
     "Communication": {
+      "CentralActorPath": "akka.tcp://scadalink@localhost:8081/user/central-communication",
       "DeploymentTimeout": "00:02:00",
       "LifecycleTimeout": "00:00:30",
       "QueryTimeout": "00:00:30",