Fix linting issues: canonicalheader, embeddedstructfieldcheck, iotamixing, makezero, testableexamples, wastedassign, usetesting, tparallel, unconvert, intrange, iface

- canonicalheader: fix cacheTTL header value to canonical form
- embeddedstructfieldcheck: move embedded fields before regular fields in 4 structs
- iotamixing: split const blocks mixing iota with non-iota constants
- makezero: use make([]T, 0, n) instead of make([]T, n) before appending
- testableexamples: add missing Output: comment to ExampleOption_UnwrapOrZero
- wastedassign: remove wasted initial assignments in 4 locations
- usetesting: replace os.MkdirTemp/os.Setenv with t.TempDir/t.Setenv in tests
- tparallel: add t.Parallel() to 8 top-level test functions
- unconvert: remove 16 unnecessary type conversions
- intrange: convert 3 for loops to use integer range syntax
- iface: consolidate identical EditPrompter and Prompt interfaces via type alias

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

pkg/cmd/workflow/shared/shared_test.go

@@ -412,7 +412,7 @@ func TestGetWorkflows(t *testing.T) {
 func generateWorkflows(t *testing.T, workflowCount int, pageNum int) []Workflow {
 	t.Helper()
 	workflows := []Workflow{}
-	for i := 0; i < workflowCount; i++ {
+	for i := range workflowCount {
 		workflows = append(workflows, Workflow{
 			Name: fmt.Sprintf("Workflow-%d-%d", pageNum, i),
 			ID:   int64(i) + int64(pageNum-1)*100,