Use one name for each thing the UI shows (closes #399)

The database target type is called an archive on its badge, in the add target form's type list and on its edit page, and its settings read "Archive expiry" and "Archive rotation" everywhere, the new webhook page included. The retry field is labelled "Delivery attempts", with its help text and error messages to match, on both target forms and in the target list, where a stored 0 shows as one attempt. The target list's other labels take the same capitalisation. The navbar says "Sign out" and the sign-in page "Sign in", and the README follows. The resubmit notice says "webhook". The stored values (`database`, `max_retries`) and their meaning are unchanged.

Model: opus-5-5

internal/handlers/target_paused_test.go

@@ -81,10 +81,10 @@ func TestPausedTarget_ShownUntilBreakerCloses(t *testing.T) {
 
 	list := targetList(t, renderSourceDetailPage(t, h, sess, wh.ID))
 	assert.Regexp(t, "t-http http Active Edit Deactivate Delete "+
-		"Deliveries Paused: after repeated failures, until "+cooldownEnds+
+		"Deliveries paused: after repeated failures, until "+cooldownEnds+
 		", then one waiting delivery is sent to test the target while "+
 		"the others wait at least one more cooldown", list)
-	assert.Equal(t, 1, strings.Count(list, "Paused"))
+	assert.Equal(t, 1, strings.Count(list, "Deliveries paused"))
 
 	log := renderSourceLogsPage(t, h, sess, wh.ID)
 	assert.Equal(t, 2, strings.Count(log, "t-http: waiting"))
@@ -105,7 +105,7 @@ func TestPausedTarget_ShownUntilBreakerCloses(t *testing.T) {
 
 	list = targetList(t, renderSourceDetailPage(t, h, sess, wh.ID))
 	assert.Contains(t, list, "t-http http Active Edit Deactivate Delete "+
-		"Deliveries Paused: held while one delivery tests whether the "+
+		"Deliveries paused: held while one delivery tests whether the "+
 		"target has recovered")
 	// Not the whole list: the add target form above the rows says UTC.
 	assert.NotContains(t, targetRow(list, "t-http", "t-log"), "UTC")
@@ -115,7 +115,7 @@ func TestPausedTarget_ShownUntilBreakerCloses(t *testing.T) {
 	breakers.Set(target.ID, delivery.CircuitClosed, 0)
 
 	list = targetList(t, renderSourceDetailPage(t, h, sess, wh.ID))
-	assert.NotContains(t, list, "Paused")
+	assert.NotContains(t, list, "Deliveries paused")
 
 	assertRetryingNotWaiting(t, h, sess, wh.ID, retrying, backedOff)
 }