fix(test): bump TestRegisteredToolCount to 39 for tbd_ship (#40)

The registered-tool-count lock still expected 38; tbd_ship makes 39. This is
why the v0.6.0 CD check job went red (build+deploy skipped, pod stayed on
v0.5.2). Count updated; task check green (exit 0).

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

internal/tools/registry_test.go

@@ -54,5 +54,5 @@ func TestEveryRegisteredToolIsDispatchable(t *testing.T) {
 // Lock the tool count so an accidental drop of a registration in RegisterAll
 // (the single source main.go and this test share) fails loudly.
 func TestRegisteredToolCount(t *testing.T) {
-	assert.Len(t, buildRegistry().Tools(), 38)
+	assert.Len(t, buildRegistry().Tools(), 39)
 }