Immutable Encodeable factory and lookup performance improvements

[marcschier]

Proposed changes

This PR introduces immutable encodeable factory with lookup performance improvements. The changes replace the existing mutable EncodeableFactory implementation with an immutable design that uses FrozenDictionary for optimized lookups and thread safety.

Key changes:

• Refactored EncodeableFactory to be immutable with a builder pattern for modifications
• Replaced ConcurrentDictionary with FrozenDictionary for 15-20% performance improvements in lookups
• Updated interfaces to separate factory creation from type lookup responsibilities

Related Issues

• Fixes #

Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• Enhancement (non-breaking change which adds functionality)
• Test enhancement (non-breaking change to increase test coverage)
• Breaking change (fix or feature that would cause existing functionality to not work as expected, requires version increase of Nuget packages)
• Documentation Update (if none of the other choices apply)

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• I ran tests locally with my changes, all passed.
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[Copilot]

Pull Request Overview

This PR introduces immutable encodeable factory with lookup performance improvements. The changes replace the existing mutable EncodeableFactory implementation with an immutable design that uses FrozenDictionary for optimized lookups and thread safety.

Key changes:

• Refactored EncodeableFactory to be immutable with a builder pattern for modifications
• Replaced ConcurrentDictionary with FrozenDictionary for 15-20% performance improvements in lookups
• Updated interfaces to separate factory creation from type lookup responsibilities

Reviewed Changes

Copilot reviewed 33 out of 34 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
Stack/Opc.Ua.Core/Types/Encoders/EncodeableFactory.cs	Complete rewrite to immutable factory with FrozenDictionary and builder pattern
Stack/Opc.Ua.Core/Types/Encoders/IEncodeableFactory.cs	New interface design separating factory, builder, and lookup responsibilities
Stack/Opc.Ua.Core/Types/Utils/TypeInfo.cs	Added XML name utility methods moved from EncodeableFactory
Tests/Opc.Ua.Core.Tests/Types/Encoders/EncodeableFactoryTests.cs	Comprehensive test suite for new factory implementation
Multiple other files	Updates to use new factory interfaces and remove telemetry parameters

Comments suppressed due to low confidence (1)

Stack/Opc.Ua.Core/Types/Utils/Utils.cs:1

• Unused imports should be removed. The removed using statements for System.Diagnostics.CodeAnalysis and Microsoft.Extensions.Logging are no longer needed.

/* Copyright (c) 1996-2022 The OPC Foundation. All rights reserved.

---

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[codecov]

Codecov Report

❌ Patch coverage is 81.65138% with 40 lines in your changes missing coverage. Please review.
✅ Project coverage is 57.53%. Comparing base (845c31d) to head (a15720c).
⚠️ Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
...ck/Opc.Ua.Core/Types/Encoders/EncodeableFactory.cs	87.96%	12 Missing and 4 partials ⚠️
Stack/Opc.Ua.Core/Types/Utils/TypeInfo.cs	70.96%	5 Missing and 4 partials ⚠️
...k/Opc.Ua.Core/Types/Encoders/IEncodeableFactory.cs	70.58%	4 Missing and 1 partial ⚠️
Stack/Opc.Ua.Core/Types/Utils/DataComparer.cs	0.00%	4 Missing ⚠️
Stack/Opc.Ua.Core/Stack/Client/DiscoveryClient.cs	50.00%	2 Missing ⚠️
Stack/Opc.Ua.Core/Types/Encoders/XmlDecoder.cs	60.00%	2 Missing ⚠️
...es/Opc.Ua.Client.ComplexTypes/ComplexTypeSystem.cs	83.33%	1 Missing ⚠️
...Ua.Gds.Client.Common/LocalDiscoveryServerClient.cs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3241      +/-   ##
==========================================
+ Coverage   57.50%   57.53%   +0.03%     
==========================================
  Files         361      362       +1     
  Lines       79163    79215      +52     
  Branches    13821    13835      +14     
==========================================
+ Hits        45521    45575      +54     
- Misses      29404    29411       +7     
+ Partials     4238     4229       -9     

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