refactor: rename ScadaLink → ZB.MOM.WW.ScadaBridge (code + projects + namespaces)

Solution + 23 src projects + 26 test projects renamed; folders, csproj,
namespaces, and ScadaLinkDbContext/ScadaBridgeDbContext class updated.
ActorSystem "scadalink" → "scadabridge", Akka seed-node URLs migrated.
SQL roles/logins, LDAP domains, CLI command name, and CLI config dir
(~/.scadalink → ~/.scadabridge) also renamed.

Build green; 5 Host.Tests fail awaiting SQL login rename in next commit.
Pre-existing StaleTagMonitor timing flakes unchanged.

Rename script committed at tools/rename-to-scadabridge.sh.

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

@@ -0,0 +1,30 @@
+using System.Net;
+
+namespace ZB.MOM.WW.ScadaBridge.IntegrationTests;
+
+/// <summary>
+/// WP-22: Readiness gating — /health/ready endpoint returns status code.
+/// </summary>
+public class ReadinessTests : IClassFixture<ScadaBridgeWebApplicationFactory>
+{
+    private readonly ScadaBridgeWebApplicationFactory _factory;
+
+    public ReadinessTests(ScadaBridgeWebApplicationFactory factory)
+    {
+        _factory = factory;
+    }
+
+    [Fact]
+    public async Task HealthReady_ReturnsSuccessStatusCode()
+    {
+        using var client = _factory.CreateClient();
+
+        var response = await client.GetAsync("/health/ready");
+
+        // The endpoint should exist and return 200 OK (or 503 if not ready yet).
+        // For now, just verify the endpoint exists and returns a valid HTTP response.
+        Assert.True(
+            response.StatusCode == HttpStatusCode.OK || response.StatusCode == HttpStatusCode.ServiceUnavailable,
+            $"Expected 200 or 503 but got {response.StatusCode}");
+    }
+}