fix(galaxyrepository): cap the per-entry filter memo at 64 signatures; bump 0.2.1 (scadaproj#41)

Both projectors memoized one full result list per filter signature with no
limit, and the signature is client-controlled (tag_name_glob '*', '**', ...),
so distinct globs retained memory until the next Galaxy deploy. A bounded FIFO
ProjectionMemo<T> now backs both memos; an evicted signature is recomputed.

- tests: ProjectionMemoBoundTests (500 distinct globs per projector, re-query
  after eviction)
- Directory.Build.props 0.2.0 -> 0.2.1 (NOT packed or published)
- code-reviews: GalaxyRepository-001 Resolved; README regenerated

Claude-Session: https://claude.ai/code/session_01GT67AEHd2Acv1YPwGfXEoV

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

@@ -4,7 +4,7 @@
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <LangVersion>latest</LangVersion>
-    <Version>0.2.0</Version>
+    <Version>0.2.1</Version>
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
   </PropertyGroup>