feat: v1 portfolio mutation, sub-resources, ledger path migration (BAT-008~011)

dcy-003/004 기반 v1 API surface 완성 및 BAT-008~011 구현·검증 완료:

- BAT-008 (REQ-019~021,024): 토큰 surface baseline 문서 갱신
- BAT-009 (REQ-025~028): POST/PATCH/DELETE/GET /v1/portfolios CRUD 신설
  - _require_write_token, _get_portfolio_or_404, soft delete, daemon-scoped list
- BAT-010 (REQ-030~032): portfolio tag/comment 서브 라우트 신설 + baseline 갱신
  - GET/POST/DELETE /v1/portfolios/{id}/tags
  - POST/GET/PATCH/DELETE /v1/portfolios/{id}/comments
- BAT-011 (REQ-029): ledger path migration
  - POST /v1/assets/{asset_id}/ledger/trades → /v1/portfolios/{portfolio_id}/ledger/trades
  - v1_ledger.py 제거, disabled 차단(409) 추가
  - test_v1.py / test_daemon_assignment.py 구 path 갱신
- 신규 tests: test_v1_portfolios_crud.py, test_v1_portfolios_list.py,
  test_v1_portfolios_tags_comments.py, test_v1_portfolios_ledger.py
- 전체 suite: 340 passed

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/repositories/portfolio_repository.py

@@ -175,6 +175,8 @@ class PortfolioRepository(Protocol):
 
     def update_portfolio(self, portfolio_id: str, **fields: object) -> Portfolio: ...
 
+    def soft_delete_portfolio(self, portfolio_id: str) -> Portfolio: ...
+
     def list_portfolios(
         self,
         *,

app/repositories/postgres.py

@@ -1636,6 +1636,21 @@ class PostgresPortfolioRepository:
             if cur.fetchone() is None:
                 raise ValueError("댓글을 찾을 수 없습니다")
 
+    def soft_delete_portfolio(self, portfolio_id: str) -> Portfolio:
+        self.ensure_schema()
+        with self._connect().cursor() as cur:
+            cur.execute(
+                """
+                UPDATE portfolios
+                SET status = 'disabled', managed_by_daemon_id = NULL, updated_at = NOW()
+                WHERE portfolio_id = %s
+                """,
+                (portfolio_id,),
+            )
+            if cur.rowcount == 0:
+                raise ValueError(f"포트폴리오를 찾을 수 없습니다: {portfolio_id}")
+        return self.get(portfolio_id)
+
     def list_portfolios_with_strategies(
         self,
         owner_user_id: str,