feat: enable reinforcement on live capture

The Stop hook now sends reinforce=true so the token-overlap matcher
runs on every captured interaction. Memory confidence will accumulate
signal from organic Claude Code use.

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

tests/test_capture_stop.py

@@ -183,7 +183,7 @@ class TestCapture:
         assert body["prompt"] == "Please explain how the backup system works in detail"
         assert body["client"] == "claude-code"
         assert body["session_id"] == "test-session-123"
-        assert body["reinforce"] is False
+        assert body["reinforce"] is True
 
     @mock.patch("capture_stop.urllib.request.urlopen")
     def test_skips_when_disabled(self, mock_urlopen, tmp_path):