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.

src/ZB.MOM.WW.ScadaBridge.Commons/Messages/Streaming/AlarmStateChanged.cs

@@ -0,0 +1,29 @@
+using ZB.MOM.WW.ScadaBridge.Commons.Types.Enums;
+
+namespace ZB.MOM.WW.ScadaBridge.Commons.Messages.Streaming;
+
+public record AlarmStateChanged(
+    string InstanceUniqueName,
+    string AlarmName,
+    AlarmState State,
+    int Priority,
+    DateTimeOffset Timestamp) : ISiteStreamEvent
+{
+    /// <summary>
+    /// Severity level when <see cref="State"/> is <see cref="AlarmState.Active"/>.
+    /// Always <see cref="AlarmLevel.None"/> for binary trigger types
+    /// (ValueMatch, RangeViolation, RateOfChange); set by the HiLo trigger
+    /// type to one of Low/LowLow/High/HighHigh based on the crossed setpoint.
+    /// Added as an init-property so existing positional constructors still
+    /// work — message contract evolves additively.
+    /// </summary>
+    public AlarmLevel Level { get; init; } = AlarmLevel.None;
+
+    /// <summary>
+    /// Optional per-band operator message (e.g., "Coolant critically low —
+    /// shut down"). Set by HiLo triggers when the per-setpoint message is
+    /// configured; otherwise empty. Notification routing and UI tooltips may
+    /// surface this to operators.
+    /// </summary>
+    public string Message { get; init; } = string.Empty;
+}

src/ZB.MOM.WW.ScadaBridge.Commons/Messages/Streaming/AttributeValueChanged.cs

@@ -0,0 +1,9 @@
+namespace ZB.MOM.WW.ScadaBridge.Commons.Messages.Streaming;
+
+public record AttributeValueChanged(
+    string InstanceUniqueName,
+    string AttributePath,
+    string AttributeName,
+    object? Value,
+    string Quality,
+    DateTimeOffset Timestamp) : ISiteStreamEvent;

src/ZB.MOM.WW.ScadaBridge.Commons/Messages/Streaming/ISiteStreamEvent.cs

@@ -0,0 +1,11 @@
+namespace ZB.MOM.WW.ScadaBridge.Commons.Messages.Streaming;
+
+/// <summary>
+/// Marker interface for events published to the site-wide stream
+/// (attribute value changes and alarm state changes).
+/// </summary>
+public interface ISiteStreamEvent
+{
+    /// <summary>The unique name of the instance that produced this event.</summary>
+    string InstanceUniqueName { get; }
+}