[05] feat(csharp): preserve generic invocation type arguments

[fernandofielmann]

Goal

Preserve C# generic invocation arguments so later .NET semantic passes can reason about DI registrations, handlers, and contracts.

Scope

• Extend CBMCall to retain ordered type arguments from C# generic_name invocations.
• Cover calls such as AddScoped<TService, TImplementation>(), Send<TResponse>(), and generic response helpers.
• Preserve fully qualified or resolvable type references where available.
• Keep non-generic calls unchanged and reject malformed/ambiguous generic syntax conservatively.
• Maintain parity between extraction, C# LSP resolution, and sequential/parallel pipelines.

Dependencies

• Depends on: [03] fix(architecture): classify layers with scoped evidence and confidence #10 ([03] architecture baseline) for roadmap ordering; implementation is otherwise independent of Angular Router.
• Blocks: [08] .NET DI, [11] MediatR, and [13] TypeScript/C# contracts.

Acceptance criteria

• CBMCall exposes generic argument count and ordered type arguments.
• Generic service/implementation pairs survive extraction and LSP resolution.
• Nested and qualified generic types are covered without changing the callee identity.
• Non-generic invocations and comparison expressions do not produce false type arguments.
• Sequential and parallel extraction results are equivalent.
• Internal API changes are documented and memory ownership is tested.

Validation

• Add positive, negative, nested, qualified, ambiguity, and deduplication fixtures.
• Run C# extraction/LSP and convergence suites, lint-ci, and scripts/test.sh.