chore: organize solution into module folders (Core/Server/Drivers/Client/Tooling)

Group all 69 projects into category subfolders under src/ and tests/ so the
Rider Solution Explorer mirrors the module structure. Folders: Core, Server,
Drivers (with a nested Driver CLIs subfolder), Client, Tooling.

- Move every project folder on disk with git mv (history preserved as renames).
- Recompute relative paths in 57 .csproj files: cross-category ProjectReferences,
  the lib/ HintPath+None refs in Driver.Historian.Wonderware, and the external
  mxaccessgw refs in Driver.Galaxy and its test project.
- Rebuild ZB.MOM.WW.OtOpcUa.slnx with nested solution folders.
- Re-prefix project paths in functional scripts (e2e, compliance, smoke SQL,
  integration, install).

Build green (0 errors); unit tests pass. Docs left for a separate pass.

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

src/Core/ZB.MOM.WW.OtOpcUa.Configuration/Entities/NodeAcl.cs

@@ -0,0 +1,32 @@
+using ZB.MOM.WW.OtOpcUa.Configuration.Enums;
+
+namespace ZB.MOM.WW.OtOpcUa.Configuration.Entities;
+
+/// <summary>
+///     One ACL grant: an LDAP group gets a set of <see cref="NodePermissions"/> at a specific scope.
+///     Generation-versioned per decision #130. See <c>acl-design.md</c> for evaluation algorithm.
+/// </summary>
+public sealed class NodeAcl
+{
+    public Guid NodeAclRowId { get; set; }
+
+    public long GenerationId { get; set; }
+
+    public required string NodeAclId { get; set; }
+
+    public required string ClusterId { get; set; }
+
+    public required string LdapGroup { get; set; }
+
+    public required NodeAclScopeKind ScopeKind { get; set; }
+
+    /// <summary>NULL when <see cref="ScopeKind"/> = <see cref="NodeAclScopeKind.Cluster"/>; otherwise the scoped entity's logical ID.</summary>
+    public string? ScopeId { get; set; }
+
+    /// <summary>Bitmask of <see cref="NodePermissions"/>. Stored as int in SQL.</summary>
+    public required NodePermissions PermissionFlags { get; set; }
+
+    public string? Notes { get; set; }
+
+    public ConfigGeneration? Generation { get; set; }
+}