fix(tests): pass --no-onboard in test_issue21_acceptance and shift evidence pins (Issue #68, review round 1)

tests/test_issue21_acceptance.py

@@ -44,7 +44,7 @@ def _sibling(main: Path, state_file):
     before = _rows(main)
     since = len(_raw_calls(state_file))
     wt = _wt(main)
-    res = _prepare(main, wt, "--creator-agent", "claude", "--herdr-session", HS)
+    res = _prepare(main, wt, "--creator-agent", "claude", "--herdr-session", HS, "--no-onboard")
     assert res.returncode == 0, res.stdout + res.stderr
     return wt, since, before
 
@@ -204,7 +204,7 @@ def test_a5b_a_stale_last_round_is_not_accepted(wt_repo, monkeypatch, tmp_path,
 def test_a6_row_recovery_and_resume_only_at_the_original_cwd(ctl, mock_herdr, mock_agents):
     main = ctl
     wt = _wt(main)
-    res = _prepare(main, wt, "--creator-agent", "claude")
+    res = _prepare(main, wt, "--creator-agent", "claude", "--no-onboard")
     assert res.returncode == 0, res.stdout + res.stderr
     (row,) = _rows(main)
     name, binding = row["name"], row["control_plane"]