Rename product to dockmv (container, image, module, env vars)

Container/image/service name, Go module path, CLI binary name, and
DOCKER_MIGRATE_* env vars still used the old working name; the project
is branded DockMV everywhere else (README, logo, Gitea repo).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

internal/dkr/inventory_live_test.go

@@ -7,15 +7,15 @@ import (
 	"testing"
 	"time"
 
-	"github.com/arescom/docker-migrate/internal/spec"
+	"github.com/arescom/dockmv/internal/spec"
 )
 
 // TestLiveInventory is a smoke test against whatever daemon the environment
-// points at. It is skipped unless DOCKER_MIGRATE_LIVE_TEST is set, because it
+// points at. It is skipped unless DOCKMV_LIVE_TEST is set, because it
 // needs a real Docker host.
 func TestLiveInventory(t *testing.T) {
-	if os.Getenv("DOCKER_MIGRATE_LIVE_TEST") == "" {
-		t.Skip("set DOCKER_MIGRATE_LIVE_TEST=1 to run against the local daemon")
+	if os.Getenv("DOCKMV_LIVE_TEST") == "" {
+		t.Skip("set DOCKMV_LIVE_TEST=1 to run against the local daemon")
 	}
 	c, err := New("")
 	if err != nil {