Fix Go, PHP, and Razor reference extraction gaps

[Widthdom]

Summary

• Fix Go generic method reference extraction so receiver methods keep method type parameter constraints, value parameter types, and return types under the method container.
• Add PHP 8.4 property hook accessor symbols and hook-body reference containment for expression and block hook bodies.
• Preserve fully dotted Razor component tag names when emitting component call references.

Validation

• dotnet test tests/CodeIndex.Tests/CodeIndex.Tests.csproj --filter "FullyQualifiedName~ReferenceExtractorTests.Extract_Go_GenericMethodsEmitTypeParameterAndParameterReferences|FullyQualifiedName~SymbolExtractorTests.Extract_PHP_DetectsPropertyHookAccessors|FullyQualifiedName~ReferenceExtractorTests.Extract_PhpPropertyHooks_EmitReferencesInsideHookBodies|FullyQualifiedName~ReferenceExtractorTests.Extract_RazorBlazor_CapturesComponentsDirectivesInjectionAndEventHandlers" -p:UseSharedCompilation=false -p:EnableAotAnalyzer=false -p:EnableTrimAnalyzer=false
• dotnet run --project tools/CodeIndex.Changelog -- check
• dotnet ./src/CodeIndex/bin/Debug/net8.0/cdidx.dll status --check --json
• dotnet build CodeIndex.sln -c Release -p:UseSharedCompilation=false

Notes

• CI currently exposes an existing dotnet format / AOT analyzer failure in unrelated JSON serialization code; tracked in Release build fails on AOT analyzer JSON serialization warnings #2791.
• Full test suite can leak ThrowingTextWriter into unrelated tests #2792 was opened during validation on an older base and then closed after latest origin/main included the process-global test isolation fix.
• Adversarial review: No blocking/actionable issues found for this PR diff.

Fixes #1440
Fixes #1445
Fixes #1479