Remove Roslyn from provider reference map

Use provider metadata and source-input lookups for generated reference-map roots so the analyzer no longer needs Roslyn project or semantic-model scans.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: live1206

packages/http-client-csharp/generator/Microsoft.TypeSpec.Generator/src/PostProcessing/GeneratedCodeWorkspace.cs

@@ -86,12 +86,12 @@ public async Task AddInMemoryFile(TypeProvider type)
 
         internal void AnalyzeProviderReferenceMap(IReadOnlyList<TypeProvider> providers)
         {
-            ProviderReferenceMapAnalyzer.Analyze(providers, _project);
+            ProviderReferenceMapAnalyzer.Analyze(providers);
         }
 
         internal void ApplyPreWriteAccessibility(IReadOnlyList<TypeProvider> providers)
         {
-            ProviderReferenceMapAnalyzer.ApplyPreWriteAccessibility(providers, _project);
+            ProviderReferenceMapAnalyzer.ApplyPreWriteAccessibility(providers);
         }
 
         private async Task UpdateProject(Document document)

packages/http-client-csharp/generator/Microsoft.TypeSpec.Generator/src/PostProcessing/PostProcessor.cs

@@ -133,9 +133,7 @@ public async Task<Project> InternalizeAsync(Project project)
                 return project;
             }
 
-            var referenceMapResult = ProviderReferenceMapAnalyzer.LatestResult is { } latestResult && latestResult.ProjectId == project.Id
-                ? latestResult
-                : null;
+            var referenceMapResult = ProviderReferenceMapAnalyzer.LatestResult;
 
             // first get all the declared symbols
             var definitions = await GetTypeSymbolsAsync(compilation, project, publicOnly: referenceMapResult == null);
@@ -144,7 +142,6 @@ public async Task<Project> InternalizeAsync(Project project)
             if (referenceMapResult != null)
             {
                 // ProviderReferenceMapAnalyzer replaces Roslyn reference-map construction for generated code.
-                // It still uses Roslyn-discovered roots for custom/shared code before this point.
                 symbolsToInternalize = GetSymbolsByName(definitions.DeclaredSymbols, referenceMapResult.InternalizeCandidates).ToArray();
                 symbolsToPublicize = GetSymbolsByName(definitions.DeclaredSymbols, referenceMapResult.PublicizeCandidates).ToArray();
             }
@@ -310,7 +307,7 @@ public async Task<Project> RemoveAsync(Project project)
             var definitions = await GetTypeSymbolsAsync(compilation, project, false);
             IEnumerable<INamedTypeSymbol> symbolsToRemove;
             HashSet<INamedTypeSymbol> referencedSet;
-            if (ProviderReferenceMapAnalyzer.LatestResult is { } referenceMapResult && referenceMapResult.ProjectId == project.Id)
+            if (ProviderReferenceMapAnalyzer.LatestResult is { } referenceMapResult)
             {
                 // The remove pass uses the same precomputed hybrid map to avoid scanning all generated
                 // documents with Roslyn while preserving custom-code references as roots.