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/integrations.go

@@ -44,13 +44,13 @@ type Handler interface {
 
 // StatusInfo is returned by the API for UI display.
 type StatusInfo struct {
-	Key            string `json:"key"`              // "onlyoffice:filebrowser"
+	Key            string `json:"key"` // "onlyoffice:filebrowser"
 	Provider       string `json:"provider"`
 	Target         string `json:"target"`
 	Label          string `json:"label"`
 	Description    string `json:"description"`
 	Enabled        bool   `json:"enabled"`
-	Status         string `json:"status"`           // "active", "error", "disabled", "provider_stopped", "target_unavailable"
+	Status         string `json:"status"` // "active", "error", "disabled", "provider_stopped", "target_unavailable"
 	LastError      string `json:"last_error,omitempty"`
 	TargetDeployed bool   `json:"target_deployed"`
 	TargetRunning  bool   `json:"target_running"`