Please address the comments from this code review:

## Overall Comments
- In `main`, when building `dynamicTypes`, `strings.SplitN(v, ",", 2)` is assumed to always return a slice of length 2; consider checking the length before indexing `split[1]` to avoid panics on malformed `-t` arguments.
- `parseFunctions` silently drops a trailing token if the interface string has an odd number of comma-separated parts (e.g. missing a signature); consider validating the input and failing fast or logging an error when the function/signature pairs are incomplete.

## Individual Comments

### Comment 1
<location> `cmd/decorate/decorate.go:310-314` </location>
<code_context>
+	return res
+}
+
+func parseFunctions(iface string) []function {
+	parts := splitTopLevel(iface)
+
+	var res []function
+	for i := 0; i+1 < len(parts); i += 2 {
+		res = append(res, function{
+			function:  parts[i],
</code_context>

<issue_to_address>
**issue:** parseFunctions silently drops a trailing unmatched token when the number of parts is odd

Because the loop uses `i+1 < len(parts)`, an odd number of elements from `splitTopLevel` causes the final element to be silently ignored. For malformed input like `Multi1,func() error,Multi2`, the trailing `"Multi2"` is dropped without any warning. Consider detecting `len(parts)%2 != 0` and either returning an error or otherwise surfacing this case so misconfiguration doesn’t lead to partially generated decorators.
</issue_to_address>