…r-partial-for-element-template.hbs)

  - Replaced bool.Parse(), Enum.Parse(), int.Parse(), double.Parse() with TryParse() patterns
  - Replaced Guid.Parse() for href references with Guid.TryParse()
  - All failures now log warnings with property name, value, and element ID

  #2 - Missing default case in reader switch (core-xmi-reader-template.hbs)
  - Added default: case to both sync and async switch(xmiReader.LocalName) blocks
  - Logs warning with unexpected element name and line/position info
  - Calls xmiReader.Skip() / xmiReader.SkipAsync() to explicitly advance past unrecognized elements

  #3 - Writer instance caching (core-xmi-writer-facade-template.hbs)
  - Writer instances are now created once in the constructor (168 local variables)
  - Captured by lambda closures — no new allocations per element dispatch
  - Removed the loggerFactory field (no longer needed after construction)

  #6 - Silent reference loss logging (core-xmi-reader-partial-for-attribute-template.hbs)
  - Added else branches with logger.LogWarning() for both single and multi-reference Guid.TryParse failures

  #4 - FindNamespaceById optimization (Serializer.cs)
  - Replaced recursive FindNamespaceById() with BuildNamespaceIndex() that builds a Dictionary<Guid, INamespace> once before the loop
  - O(1) lookups instead of O(N) tree walks per source file

  #8 - DI for IXmiDataWriterFacade (Serializer.cs, tests)
  - Serializer constructor now accepts IXmiDataWriterFacade instead of creating XmiDataWriterFacade directly
  - Updated SerializerTestFixture.cs and RoundTripTestFixture.cs to pass facade

  #9 - Mutable elementOriginMap field (DeSerializer.cs)
  - Removed mutable IXmiElementOriginMap elementOriginMap instance field
  - Threaded elementOriginMap as a parameter through the entire method chain: DeSerialize → Read/ReadAsync → ResolveExternalReference/ResolveExternalReferenceAsync
  - DeSerializer instances are now safely reusable across calls with different origin maps