feat: batch update - gift card breakdown spec, backend APIs, miniprogram pages, ETL finance recharge, docs & migrations

AI_CHANGELOG.md

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+# AI 变更日志
+
+本文件记录所有由 AI 辅助完成的代码变更，按时间倒序排列。
+
+---
+
+## 2026-03-19 18:46:00 — card_type_id 年卡/月卡映射文档同步
+
+**Prompt-ID**: P20260319-174017 | **审计记录**: [docs/audit/changes/2026-03-19__card-type-id-doc-sync.md](docs/audit/changes/2026-03-19__card-type-id-doc-sync.md)
+
+- `apps/etl/connectors/feiqiu/docs/api-reference/endpoints/member_stored_value_cards.md`：card_type_id 枚举改为表格，补充年卡/月卡
+- `apps/etl/connectors/feiqiu/docs/api-reference/endpoints/member_balance_changes.md`：card_type_id 枚举补充年卡/月卡，"四种卡型"→"六种卡型"
+- `apps/etl/connectors/feiqiu/docs/api-reference/summary/member_balance_changes.md`：card_type_id 和 memberCardTypeName 枚举补充年卡/月卡
+- `apps/etl/connectors/feiqiu/docs/database/DWS/main/BD_manual_dws_finance_recharge_summary.md`：新增"其他卡类型"段落标注年卡/月卡未被统计
+- `apps/etl/connectors/feiqiu/docs/etl_tasks/dws_tasks.md`：两处卡类型映射表补充年卡/月卡行
+- `docs/prd/specs/P12-gift-card-breakdown.md`：新增 P12 礼品卡矩阵细分 PRD
+
+## 2026-03-19 17:40:17 — fdw_queries level 映射硬编码修复（P2-9）
+
+**Prompt-ID**: P20260319-174017 | **审计记录**: [docs/audit/changes/2026-03-19__level-map-hardcode-fix.md](docs/audit/changes/2026-03-19__level-map-hardcode-fix.md)
+
+- `apps/backend/app/services/fdw_queries.py`：新增 `get_level_map()` 从 `v_cfg_assistant_level_price` 动态读取等级映射；`get_assistant_info()` 和 `get_all_assistants()` 删除硬编码 `_level_map`，改用动态查询
+
+---
+
+## 2026-03-19 16:45:10 — coach_service 绩效档位硬编码修复
+
+**Prompt-ID**: P20260319-163903 | **审计记录**: [docs/audit/changes/2026-03-19__coach-tier-hardcode-fix.md](docs/audit/changes/2026-03-19__coach-tier-hardcode-fix.md)
+
+- `apps/backend/app/services/coach_service.py`：删除 `DEFAULT_TIER_NODES` 硬编码，替换为 `_FALLBACK_TIER_NODES`（降级用）；`_build_tier_nodes()` 改为从 `cfg_performance_tier` 配置表动态读取；`perf_target` 改为根据 tier_nodes 动态推算
+- `apps/backend/app/services/fdw_queries.py`：更新 `get_salary_calc()` 中 tier_nodes 注释，明确由 coach_service 从配置表读取