Phase 0 — mechanical rename ZB.MOM.WW.LmxOpcUa.* → ZB.MOM.WW.OtOpcUa.*

Renames all 11 projects (5 src + 6 tests), the .slnx solution file, all source-file namespaces, all axaml namespace references, and all v1 documentation references in CLAUDE.md and docs/*.md (excluding docs/v2/ which is already in OtOpcUa form). Also updates the TopShelf service registration name from "LmxOpcUa" to "OtOpcUa" per Phase 0 Task 0.6.

Preserves runtime identifiers per Phase 0 Out-of-Scope rules to avoid breaking v1/v2 client trust during coexistence: OPC UA `ApplicationUri` defaults (`urn:{GalaxyName}:LmxOpcUa`), server `EndpointPath` (`/LmxOpcUa`), `ServerName` default (feeds cert subject CN), `MxAccessConfiguration.ClientName` default (defensive — stays "LmxOpcUa" for MxAccess audit-trail consistency), client OPC UA identifiers (`ApplicationName = "LmxOpcUaClient"`, `ApplicationUri = "urn:localhost:LmxOpcUaClient"`, cert directory `%LocalAppData%\LmxOpcUaClient\pki\`), and the `LmxOpcUaServer` class name (class rename out of Phase 0 scope per Task 0.5 sed pattern; happens in Phase 1 alongside `LmxNodeManager → GenericDriverNodeManager` Core extraction). 23 LmxOpcUa references retained, all enumerated and justified in `docs/v2/implementation/exit-gate-phase-0.md`.

Build clean: 0 errors, 30 warnings (lower than baseline 167). Tests at strict improvement over baseline: 821 passing / 1 failing vs baseline 820 / 2 (one flaky pre-existing failure passed this run; the other still fails — both pre-existing and unrelated to the rename). `Client.UI.Tests`, `Historian.Aveva.Tests`, `Client.Shared.Tests`, `IntegrationTests` all match baseline exactly. Exit gate compliance results recorded in `docs/v2/implementation/exit-gate-phase-0.md` with all 7 checks PASS or DEFERRED-to-PR-review (#7 service install verification needs Windows service permissions on the reviewer's box).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/ZB.MOM.WW.OtOpcUa.Host/Domain/ConnectionState.cs

@@ -0,0 +1,38 @@
+namespace ZB.MOM.WW.OtOpcUa.Host.Domain
+{
+    /// <summary>
+    ///     MXAccess connection lifecycle states. (MXA-002)
+    /// </summary>
+    public enum ConnectionState
+    {
+        /// <summary>
+        ///     No active session exists to the Galaxy runtime.
+        /// </summary>
+        Disconnected,
+
+        /// <summary>
+        ///     The bridge is opening a new MXAccess session to the runtime.
+        /// </summary>
+        Connecting,
+
+        /// <summary>
+        ///     The bridge has an active MXAccess session and can service reads, writes, and subscriptions.
+        /// </summary>
+        Connected,
+
+        /// <summary>
+        ///     The bridge is closing the current MXAccess session and draining runtime resources.
+        /// </summary>
+        Disconnecting,
+
+        /// <summary>
+        ///     The bridge detected a connection fault that requires operator attention or recovery logic.
+        /// </summary>
+        Error,
+
+        /// <summary>
+        ///     The bridge is attempting to restore service after a runtime communication failure.
+        /// </summary>
+        Reconnecting
+    }
+}