fix(cli): fix completion guard to cover all completion subcommands

Use cmd.CommandPath() to match the full "kbc completion" subtree
instead of cmd.Name() == "completion", which only matched the parent
command itself. When running "kbc completion bash", cmd.Name() returns
"bash" (not "completion"), so the original guard failed to skip
the dep stack init for the actual shell-specific subcommands.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Matovidlo

internal/pkg/service/cli/cmd/cmd.go

@@ -147,7 +147,7 @@ func NewRootCommand(stdin io.Reader, stdout io.Writer, stderr io.Writer, osEnvs
 	root.PersistentPreRunE = func(cmd *cobra.Command, args []string) error {
 		// Completion commands don't need the full dependency stack.
 		// __complete is the hidden command invoked by the shell on every TAB press.
-		if cmd.Name() == "completion" || cmd.Name() == "__complete" {
+		if cmd.Name() == "__complete" || strings.HasPrefix(cmd.CommandPath(), "kbc completion") {
 			return nil
 		}