chore(hub): revert incidental gofmt-only reformatting outside slice-3 scope

Restores notify/templates.go, store/telemetry.go, web/configs.go to upstream —
those were alignment-only churn from a tree-wide gofmt, not part of slice 3. Keeps
the host-domain diff additions-only.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

hub/internal/web/configs.go

@@ -792,10 +792,10 @@ func flattenYAML(m map[string]interface{}, prefix string) map[string]string {
 
 // configDiff represents a single key-value difference between two configs.
 type configDiff struct {
-	Key       string `json:"key"`
-	HubValue  string `json:"hub"`
-	CtrlValue string `json:"controller"`
-	Status    string `json:"status"` // "changed", "hub_only", "controller_only"
+	Key        string `json:"key"`
+	HubValue   string `json:"hub"`
+	CtrlValue  string `json:"controller"`
+	Status     string `json:"status"` // "changed", "hub_only", "controller_only"
 }
 
 // compareYAMLValues parses two YAML strings and returns their value differences.