Show edge and site versions with Update buttons; Update now for Hammerhead itself

Edges and sites report their version and whether auto-update is on. Hammerhead can ask a machine that
has auto-update on to install the newest release, and shows the outcome. Requests carry an ID so a
stale result can't answer a new one.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

go.mod

@@ -3,9 +3,9 @@ module git.veillax.com/Veillax/hammerhead
 go 1.27.3
 
 require (
-	git.veillax.com/Veillax/bamboo v0.1.3
-	git.veillax.com/Veillax/blacktip v0.1.4
-	git.veillax.com/Veillax/reef v0.1.4
+	git.veillax.com/Veillax/bamboo v0.1.4
+	git.veillax.com/Veillax/blacktip v0.1.6
+	git.veillax.com/Veillax/reef v0.1.6
 	github.com/emersion/go-msgauth v0.7.0
 	golang.org/x/crypto v0.58.0
 	modernc.org/sqlite v1.61.0