fix(site-import): 终审两阻塞——移除诊断落盘（c0eae14 反向提交修正）+ 租户 AI 槽位接线（routes→task→make_provider 传配置快照）

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

app/platform/routes/site_import_routes.py

@@ -20,8 +20,10 @@
 """
 from fastapi import APIRouter, Depends, HTTPException, Request
 from pydantic import BaseModel
+from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from app.platform.db import TenantConfigVersion
 from app.platform.routes.tenant_routes import _get_tenant_or_404, _tenant_guard
 from app.platform.site_import import safe_fetch, task
 
@@ -41,6 +43,13 @@ async def start_import(slug: str, body: StartRequest, request: Request,
     engine = request.app.state.platform_engine
     async with AsyncSession(engine, expire_on_commit=False) as session:
         tenant = await _get_tenant_or_404(session, slug)
+        # 租户配置快照（终审 Important #2：AI 三级链的租户槽位——传给
+        # task.start → make_provider；自有 ai.* 配置的租户烧自己配额）
+        latest = (await session.execute(
+            select(TenantConfigVersion.config_json)
+            .where(TenantConfigVersion.tenant_id == tenant.id)
+            .order_by(TenantConfigVersion.version.desc())
+            .limit(1))).scalar_one_or_none()
     if tenant.status != "active":
         raise HTTPException(
             status_code=403, detail=f"租户 {slug!r} 已停用，无法发起导入")
@@ -67,7 +76,8 @@ async def start_import(slug: str, body: StartRequest, request: Request,
         url = body.url
 
     try:
-        task_id = await task.start(slug, url, retry_task_id=retry_task_id)
+        task_id = await task.start(slug, url, retry_task_id=retry_task_id,
+                                    config_data=latest)
     except task.ImportRateLimited as exc:
         raise HTTPException(status_code=429, detail=str(exc)) from exc
     except task.ConcurrentLimit as exc: