chore: give every coverage pragma a reason (TS6)

examples/app.py

@@ -51,7 +51,7 @@ def build_server(port: str = "127.0.0.1:0") -> tuple[grpc.Server, int, Container
     return server, bound_port, container
 
 
-if __name__ == "__main__":  # pragma: no cover
+if __name__ == "__main__":  # pragma: no cover - script entry point; tests call build_server() directly
     _server, _port, _container = build_server("[::]:50051")
     print(f"Serving on port {_port}; Ctrl+C to stop")  # noqa: T201
     try:

tests/test_aio.py

@@ -142,11 +142,8 @@ async def test_aio_app_finalizer_runs_on_root_close() -> None:
         stub = greeter_pb2_grpc.GreeterStub(channel)
         await stub.SayHello(HelloRequest(name="x"))
     await server.stop(0)
-    # coveragepy #2124: on Python 3.11 the tracer can lose 1-2 lines right after awaiting
-    # a coroutine that cancels tasks internally, which server.stop does to its own
-    # background tasks. Excluded (not skipped) so the flake can't fail --cov-fail-under.
-    await container.close_async()  # pragma: no cover
-    assert app_teardowns == ["app-closed"]  # pragma: no cover
+    await container.close_async()  # pragma: no cover - coveragepy #2124: 3.11 can drop lines after server.stop
+    assert app_teardowns == ["app-closed"]  # pragma: no cover - coveragepy #2124: 3.11 can drop lines after server.stop
 
 
 async def test_wrap_unary_aio_resets_context_var_when_close_raises() -> None:

tests/test_inject.py

@@ -51,7 +51,7 @@ def test_inject_raises_without_interceptor() -> None:
     def method(
         _self: object, _request: str, _context: object, _app_res: typing.Annotated[AppResource, FromDI(AppResource)]
     ) -> None:
-        pass  # pragma: no cover
+        pass  # pragma: no cover - never runs; inject raises before the call without DIInterceptor
 
     def _call() -> None:
         with pytest.raises(RuntimeError, match="DIInterceptor"):