fix(tests): update Scan for embedded files test to use existing test data

The test was failing in CI because it referenced src/web/static/images/cook_male-32x32.png
which was removed in v1.7.1 upstream cleanup (88 web UI files deleted).

Changed to use tests/node/sampleData/pic.jpg which is already used by other tests
and provides the same functionality for testing the scanForEmbeddedFiles operation.

Fixes: Core Logic CI workflow failure on run 20291915673
Related: v1.7.1 release upstream file cleanup

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

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

Author: doublegate

tests/node/tests/operations.mjs

@@ -838,7 +838,7 @@ pCGTErs=
     }),
 
     it("Scan for embedded files", () => {
-        const result = chef.scanForEmbeddedFiles(fs.readFileSync("src/web/static/images/cook_male-32x32.png"));
+        const result = chef.scanForEmbeddedFiles(fs.readFileSync("tests/node/sampleData/pic.jpg"));
         const expected = "Scanning data for 'magic bytes' which may indicate embedded files.";
         assert.ok(result.toString().indexOf(expected) === 0);
     }),