chore: remove unused computeFileHash import from scan command

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

Author: invalid

cli/src/commands/scan.js

@@ -1,6 +1,6 @@
 import path from 'path';
 import { scanProject } from '../scanner.js';
-import { saveGraph, computeFileHash, getGitCommitHash } from '../graph.js';
+import { saveGraph, getGitCommitHash } from '../graph.js';
 import { saveSlices } from '../slicer.js';
 
 /**