v0.9.0

Summary

• Improve C#, Rust, Go, Kotlin, and JavaScript call graph resolution after the structured call-reference release.
• Add C# call normalization, external call nodes for known .NET/test/LINQ APIs, and richer local receiver type inference.
• Resolve C# receiver calls from explicit locals, fields/properties, parameters, return types, chained calls, this, and base where possible.
• Classify string/primitive receiver calls such as string.Format, string.Join, Substring, and literal .AsSpan() as external System types.
• Bump AST graph schema to version 25 so existing graph caches rebuild.

Verification

• go test ./...
• go vet ./...
• go build -o ./bin/repobridge ./cmd/repobridge