style: gofmt normalization — no logic changes

gofmt -w across the controller tree (46 files) so gofmt -l is empty — disarms the
formatting landmine where a targeted edit + accidental gofmt -w swept ~46 unrelated
files. Pure formatting: whitespace + gofmt's optional-semicolon removal in reflowed
inline closures. One doc comment reworded ('' -> 'the empty string') to avoid gofmt's
Go-1.19 doc-comment typographic substitition ('' -> curly quote) muddying its meaning.
No build/vet/test behavior change.

controller/internal/integrations/onlyoffice_nextcloud.go

@@ -32,7 +32,7 @@ func (h *OnlyOfficeNextcloudHandler) Apply(ac *ApplyContext) error {
 
 	// Install and configure OnlyOffice app in Nextcloud
 	commands := []struct {
-		args    []string
+		args     []string
 		tolerate string // substring in output to tolerate as success
 	}{
 		{