feat: Add issue IDs to TODO comments

Updated TODO comments with proper beads issue IDs:
- bd-hdt: Implement auto-merge functionality
- bd-gqo: Implement daemon health checks
- bd-r46: Support --reason flag in daemon mode for reopen

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

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

cmd/bd/reopen.go

@@ -58,7 +58,7 @@ This is more explicit than 'bd update --status open' and emits a Reopened event.
 					fmt.Fprintf(os.Stderr, "Error reopening %s: %v\n", id, err)
 					continue
 				}
-				// TODO: Add reason as a comment once RPC supports AddComment
+				// TODO(bd-r46): Add reason as a comment once RPC supports AddComment
 				if reason != "" {
 					fmt.Fprintf(os.Stderr, "Warning: reason not supported in daemon mode yet\n")
 				}