fix(ci): hypatia-scan working-directory env.HOME -> /home/runner/hypatia

verisimiser was missed by the estate-wide env.HOME sweep (both this
branch and origin/main carry the bug). `working-directory:
${{ env.HOME }}/hypatia` — env.HOME is not a workflow env: var, so it
resolves empty and the Build step runs in '/hypatia' → 'No such file
or directory', failing the whole Hypatia Neurosymbolic Analysis check
before the scanner runs. The Clone step already puts the repo at
/home/runner/hypatia. Canonical fix matching the estate template.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: tanush5800

.github/workflows/hypatia-scan.yml

@@ -41,7 +41,7 @@ jobs:
           fi
 
       - name: Build Hypatia scanner (if needed)
-        working-directory: ${{ env.HOME }}/hypatia
+        working-directory: /home/runner/hypatia
         run: |
           if [ ! -f hypatia-v2 ]; then
             echo "Building hypatia-v2 scanner..."