P3b: sync stale comments after footer contract cleanup

- tests/test_installer.py L1297/L1351: remove outdated 'replay still
  mentioned' comment; footer assertion now matches cleaned source
- tasks.md 2.20: update note to reflect footer assertions are now
  aligned with current source (no longer deferred)

Author: Li-Sanze

.sopify-skills/history/2026-05/20260508_p3b_perimeter_cleanup/tasks.md

@@ -54,7 +54,7 @@ plan_status: completed
 - [x] 2.17 `tests/test_runtime_decision.py`：`replay_session_dir=None` 引用（L604）——清除
 - [x] 2.18 `tests/test_runtime_sample_invariant_gate.py`：replay_required 相关断言（L92-107）——清除
 - [x] 2.19 `tests/test_runtime_skill_registry.py`：workflow-learning assertIn（L61）——删除
-- [x] 2.20 `tests/test_installer.py`：replay 相关引用（L895）——已清除 gitignore 断言；L1301/L1354 footer 断言保留（prompt asset 未更新，注释标注）
+- [x] 2.20 `tests/test_installer.py`：replay 相关引用（L895）——已清除 gitignore 断言；L1301/L1354 footer 断言已同步更新（prompt asset replay 引用已移除，断言与当前 source 对齐，注释已同步）
 - [x] 2.21 验证 tests/__pycache__ 中 replay 相关 .pyc 为 0（tests/__pycache__、tests/protocol/__pycache__、tests/pytest_entries/__pycache__ 均无 replay 相关 .pyc；__pycache__ 目录本身包含其他正常缓存，不删除）
 
 ### Runtime 外围残留

tests/test_installer.py

@@ -1294,7 +1294,7 @@ def test_codex_cn_prompt_install_keeps_workspace_preflight_contract(self) -> Non
             self.assertIn("必须继续遵守对应 checkpoint 的机器契约", prompt)
 
     def test_codex_cn_installed_prompt_assets_keep_footer_contract(self) -> None:
-        # Prompt assets still mention replay until the installed footer copy is updated.
+        # Footer contract aligned: replay reference removed from source and assertion.
         self._assert_installed_footer_contract(
             adapter=CODEX_ADAPTER,
             language_directory="CN",
@@ -1348,7 +1348,7 @@ def test_claude_en_prompt_install_keeps_workspace_preflight_contract(self) -> No
             self.assertIn("must still honor the machine contract", prompt)
 
     def test_claude_en_installed_prompt_assets_keep_footer_contract(self) -> None:
-        # Prompt assets still mention replay until the installed footer copy is updated.
+        # Footer contract aligned: replay reference removed from source and assertion.
         self._assert_installed_footer_contract(
             adapter=CLAUDE_ADAPTER,
             language_directory="EN",