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/config/config.go

@@ -17,7 +17,7 @@ import (
 // is fetched once via the hub consume endpoint (never in config). Mirrors hub offsite.Descriptor.
 type OffsiteConfig struct {
 	Enabled         bool   `yaml:"enabled"`
-	Type            string `yaml:"type"`      // "shared" | "dedicated"
+	Type            string `yaml:"type"` // "shared" | "dedicated"
 	Host            string `yaml:"host"`
 	User            string `yaml:"user"`
 	Port            int    `yaml:"port"`      // 23