fix: resolve golangci-lint errors

- Add _ = prefix for ignored Close/Remove return values
- Fix unused cmd parameter in runMoleculeReady
- Add nolint:misspell for intentional British "cancelled" spelling
- Update comments to use US spelling where not intentional

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

cmd/bd/ready.go

@@ -268,7 +268,7 @@ var blockedCmd = &cobra.Command{
 }
 
 // runMoleculeReady shows ready steps within a specific molecule
-func runMoleculeReady(cmd *cobra.Command, molIDArg string) {
+func runMoleculeReady(_ *cobra.Command, molIDArg string) {
 	ctx := rootCtx
 
 	// Molecule-ready requires direct store access for subgraph loading