Fix: grep exit code in verify source code step

The previous || pattern didn't properly handle grep's exit code.
Using if/else ensures correct exit behavior:
- Exit 0 when assertTrue is NOT found (correct)
- Exit 1 when assertTrue IS found (error)

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

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

Author: SentienceDEV

.github/workflows/test.yml

@@ -41,7 +41,12 @@ jobs:
         echo "=== Verifying assert_ method exists ==="
         grep -n "def assert_" sentience/agent_runtime.py
         echo "=== Checking for assertTrue (should NOT exist) ==="
-        grep -n "assertTrue" sentience/agent_runtime.py || echo "Good: no assertTrue found"
+        if grep -n "assertTrue" sentience/agent_runtime.py; then
+          echo "ERROR: Found assertTrue - this should have been removed!"
+          exit 1
+        else
+          echo "Good: no assertTrue found"
+        fi
 
     - name: Lint with pre-commit
       continue-on-error: true