A dimensional analysis would have shown this to be incorrect; per is the
period over which the rate value is applied and so should be in s, but
this makes it in s², giving a rate in s¯².

cel-go v0.28.0 fixes runtime node identity retention, so also update
tests to capture the correct expected error locations.

v0.27.0 is marked as a breaking release. The breaking change
(google/cel-go@c66b3130b) removes standard type names (int, string,
bool, etc.) from the environment's variable declarations. Before
this change, declaring a user variable with one of those names
caused an "overlapping identifier" error; now user variables can
shadow type names. Type resolution is unaffected because the
checker falls through to the type provider. We do not declare
any user variables with standard type names, so this has no
impact on mito.

[git-generate]
go get google.golang.org/genproto/googleapis/rpc@v0.0.0-20260319201613-d00831a3d3e7
go get github.com/google/cel-go@v0.28.0
go mod tidy

go run github.com/uber-go/gopatch@latest . << PATCH
@@
@@
- ast, iss = cel.NewStaticOptimizer(folder).Optimize(env, ast)
+ opt, err := cel.NewStaticOptimizer(folder)
+ if err != nil {
+     return nil, nil, nil, fmt.Errorf("failed to make new static optimizer: %v", err)
+ }
+ ast, iss = opt.Optimize(env, ast)

@@
@@
- return types.NewErr(err.Error())
+ return types.NewErr("%v", err)

@@
var x identifier
@@
- return types.ValOrErr(x, "no such overload for "+name)
+ return types.ValOrErr(x, "no such overload for %s", name)

PATCH

sed -r -i 's/(<input>:2:6)2/\10/' testdata/serve_tls.txt
go test -update

cel-go v0.27.0 (google/cel-go#1261) changed ConvertToNative to
remap interface{} targets to map[any]any for maps and []any for
lists. This breaks type switches in makeMapStrings, makeStrings,
and mapStrings that expected the previous map[ref.Val]ref.Val and
[]ref.Val types.

Add cases for the new types, round-tripping through NativeToValue
and ConvertToNative with an explicit target type.