feat(health): scaffold ZB.MOM.WW.Health solution + Task 4 (tags + three-tier MapZbHealth)

Consolidates the library into the scadaproj repo (matching the ZB.MOM.WW.Auth
convention — tracked in-parent, not a nested repo). 3 dependency-split packages
(core / .Akka / .EntityFrameworkCore) + 3 test projects, .slnx, central PM.
Task 4: ZbHealthTags + MapZbHealth (/health/ready,/active,/healthz). 8/8 tests.

ZB.MOM.WW.Health/Directory.Build.props

@@ -0,0 +1,12 @@
+<Project>
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <LangVersion>latest</LangVersion>
+    <Version>0.1.0</Version>
+    <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
+  </PropertyGroup>
+
+</Project>