M3a：息壤三级记忆域——归真触发提取管线/白名单明忆/重忆确认/正影版本链/删除墓碑/双通道召回注入，退役旧记忆-抽取-反思-大周天-演化管线（迁移 004，验收 7 用例）

backend/app/services/imports.py

@@ -15,7 +15,6 @@ from app.core.errors import AppError
 from app.core.time import utc_now
 from app.db.session import AsyncSessionLocal
 from app.models.imports import CharacterImportJob, ImportItem
-from app.models.memory import Memory
 from app.modules.imports import parse_import
 from app.repositories import candidates as candidates_repo
 from app.repositories import imports as imports_repo
@@ -325,29 +324,13 @@ async def _trigger_extraction(
     kind: str,
     owner_scope: str = settings.default_owner_scope,
 ) -> ImportJobResponse:
-    """校验 job → 置 extracting_* → 启动后台抽取 → 返回 job 当前状态。"""
-    async with AsyncSessionLocal() as session:
-        character = await get_owned_character(session, character_id, owner_scope=owner_scope)
-        job = await _get_owned_job(session, character.id, import_id)
-        if job.status not in _EXTRACTABLE_STATUSES:
-            raise AppError("conflict", f"任务状态 {job.status} 不可触发抽取。")
-        job.status = status
-        await session.commit()
-
-    from app.application.imports import (
-        start_memory_extraction,
-        start_personality_extraction,
-        start_profile_extraction,
+    """抽取触发已随旧管线退役：记忆候选由息壤归真管线生成（M3），画像/人格抽取随 M6。"""
+    raise AppError(
+        "not_implemented",
+        "该抽取入口已退役：记忆候选经镜树归真生成（息壤 M3）；画像/人格抽取随 M6 灵核重建。",
+        status_code=410,
     )
 
-    starters = {
-        "profile": start_profile_extraction,
-        "memory": start_memory_extraction,
-        "personality": start_personality_extraction,
-    }
-    starters[kind](import_id)
-    return await _reload_job(import_id)
-
 
 async def list_profile_candidates(
     character_id: str,