Refactor core APIs, fix bugs, and improve safety

- Make image result/info structs readonly; improve error handling and memory safety in image library
- Introduce IJobScheduler interface; move job scheduling docs to interface
- Remove "index 0 invalid" convention from slot/sparse maps; fix Count logic
- Add Owner<T> for disposable value types in low-level utilities
- Improve ObjectPool<T> thread safety and logic
- Change List<T>.RemoveAndSwapBack to return bool
- Remove unsafe methods from generated math types; add debug range checks
- Update benchmarks and enable collection checks in tests
- Improve documentation, comments, and error messages
- Bump assembly versions across all projects

Misaki.HighPerformance.Mathematics.CodeGen/Generators/GeneratorBase.cs

@@ -6,7 +6,7 @@ namespace Misaki.HighPerformance.Mathematics.CodeGen.Generators
 {
     internal abstract class GeneratorBase
     {
-        protected const string INLINE_METHOD_ATTRIBUTE = "[global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining | global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveOptimization)]";
+        protected const string INLINE_METHOD_ATTRIBUTE = "[global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]";
 
         protected static readonly string[] s_matrixComponents = new[] { "c0", "c1", "c2", "c3" };
         protected static readonly string[] s_vectorComponents = new[] { "x", "y", "z", "w" };
@@ -19,10 +19,9 @@ namespace Misaki.HighPerformance.Mathematics.CodeGen.Generators
             this.typeInfo = typeInfo;
             sourceBuilder.Clear();
 
-            var message = Validation();
-            if (message != null)
+            if (!Validation(out var message))
             {
-                return message;
+                return message ?? string.Empty;
             }
 
             Initialize();
@@ -51,9 +50,10 @@ namespace Misaki.HighPerformance.Mathematics.CodeGen.Generators
 #endregion");
         }
 
-        protected virtual string? Validation()
+        protected virtual bool Validation(out string? message)
         {
-            return null;
+            message = null;
+            return true;
         }
 
         protected virtual void Initialize()