Go 1.28 to flag missing Err checks on bufio.Scanner and sql.Rows

An accepted proposal adds vet analyzers for the two Err-check bugs everyone has written at least once, catching missing bufio.Scanner.Err and sql.Rows.Err calls in Go 1.28, with the gopls implementations already landed. On the discussion side, r/golang is asking whether chi still earns its keep now that the standard mux has grown up, which is a fair question to sit with while the toolchain quietly closes off another class of silent failures.