feat: 服务层配置接线——email/push/rate_limit/AI凭据/行为开关/映射表/种子键

Task 9: 服务层对全局 settings 的业务引用清零,每个 DEFAULT_CONFIG 组
都有真实消费方。resolve_*_settings(email/push/ai)以空槽回退 env
(平台默认层);contact 行为开关/种子白名单/国名扩表/限流上限经
manager 的 runtime.config 接线。收口: lead_push session_factory 必填、
config.py 死代码清理、PromptProvider frozen、no_contact 视图直取、
AIService wall 参数定型 CompiledWall。403 测试全绿(389+14)。

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

tests/test_lead_email_trigger.py

@@ -60,15 +60,16 @@ def _setup(async_db, monkeypatch, source=ConversationSource.widget, ai=None):
     sent = []
 
     async def fake_lead(customer_profile, contact_info, reasoning,
-                        conversation_messages, intent_level="", cc_info=None):
+                        conversation_messages, intent_level="", cc_info=None,
+                        config_data=None):
         sent.append(("lead", dict(contact_info), intent_level))
         return True
 
-    async def fake_nudge(contact_info, cc_info=None):
+    async def fake_nudge(contact_info, cc_info=None, config_data=None):
         sent.append(("nudge", dict(contact_info), ""))
         return True
 
-    async def fake_fix(contact_info, count=1, cc_info=None):
+    async def fake_fix(contact_info, count=1, cc_info=None, config_data=None):
         sent.append(("fix", dict(contact_info), ""))
         return True