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/agentapi/netstorage_test.go

@@ -9,8 +9,8 @@ import (
 )
 
 func netStub(t *testing.T) (*httptest.Server, string, *struct {
-	addBody   AddNetStorageRequest
-	removed   string
+	addBody AddNetStorageRequest
+	removed string
 }) {
 	captured := &struct {
 		addBody AddNetStorageRequest