feat: 领券数据看板 — coupon_session 流水表 + admin 聚合接口

- 新表 coupon_session(一次领券一行,trace_id 唯一):POST /api/v1/coupon/session
  两段 upsert(发起 started / 收尾 completed·failed·abandoned),记全程耗时、各平台耗时、
  机型/ROM、app_env、trace_url、origin_package(发起来源)。
- admin GET /admin/api/coupon-data:发起/完成数 + 平均耗时 + P5/P50/P95/P99(Python 算分位,
  SQLite 无 percentile)+ 按天/小时趋势 + 明细分页 + join 用户手机号/昵称,app_env 默认 prod;
  另加 GET /admin/api/coupon-data/user-records 供「点手机号看该用户全部领券」抽屉。
- 迁移拆 3 个:建表 coupon_session_table + trace_url 加列 + origin_package 加列
  (建表迁移已被某环境应用后改它不重跑,故新列单独加列迁移)。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/repositories/coupon_state.py

@@ -6,7 +6,7 @@
 from __future__ import annotations
 
 import logging
-from datetime import date, datetime
+from datetime import date, datetime, timezone
 from zoneinfo import ZoneInfo
 
 from sqlalchemy import delete, func, select
@@ -17,6 +17,7 @@ from app.models.coupon_state import (
     CouponClaimRecord,
     CouponDailyCompletion,
     CouponPromptEngagement,
+    CouponSession,
 )
 
 logger = logging.getLogger("shagua.coupon_state")
@@ -232,3 +233,91 @@ def sum_claimed_count(db: Session, user_id: int) -> int:
         )
     ).scalar_one()
     return int(total or 0)
+
+
+# ===== 领券任务流水(coupon_session,admin「领券数据」看板数据源)=====
+
+def upsert_coupon_session(
+    db: Session,
+    *,
+    trace_id: str,
+    device_id: str,
+    status: str,
+    started_at_ms: int,
+    user_id: int | None = None,
+    platforms: list[str] | None = None,
+    origin_package: str | None = None,
+    device_model: str | None = None,
+    rom: str | None = None,
+    app_env: str | None = None,
+    elapsed_ms: int | None = None,
+    platform_elapsed: dict | None = None,
+    claimed_count: int | None = None,
+    trace_url: str | None = None,
+) -> None:
+    """一条领券流水按 trace_id 幂等 upsert(发起 started 建行、收尾终态更新同一行)。
+
+    - 乱序/重复兜底:终态(completed/failed/abandoned)先到也建行;started 重复到不覆盖已有终态
+      (状态只前进,不降级)。
+    - started_at 由客户端墙钟毫秒转;started_date 取其 Asia/Shanghai 自然日(admin 按天聚合/筛选)。
+    - 终态帧补 finished_at=服务端 now;各字段非空才写(避免 started 帧的 None 抹掉收尾值,反之亦然)。
+    并发 IntegrityError 回滚忽略(本就幂等)。
+    """
+    started_at = datetime.fromtimestamp(started_at_ms / 1000, tz=timezone.utc)
+    started_date = started_at.astimezone(_CN_TZ).date()
+    is_terminal = status in ("completed", "failed", "abandoned")
+
+    row = db.execute(
+        select(CouponSession).where(CouponSession.trace_id == trace_id)
+    ).scalar_one_or_none()
+
+    if row is None:
+        db.add(CouponSession(
+            trace_id=trace_id,
+            device_id=device_id,
+            user_id=user_id,
+            status=status,
+            app_env=app_env,
+            platforms=platforms,
+            origin_package=origin_package,
+            device_model=device_model,
+            rom=rom,
+            started_at=started_at,
+            started_date=started_date,
+            finished_at=datetime.now(timezone.utc) if is_terminal else None,
+            elapsed_ms=elapsed_ms,
+            platform_elapsed=platform_elapsed,
+            claimed_count=claimed_count,
+            trace_url=trace_url,
+        ))
+    else:
+        # 状态只前进:started 帧重复到(如 START_STICKY 重启)不把已有终态降级回 started。
+        if not (status == "started" and row.status in ("completed", "failed", "abandoned")):
+            row.status = status
+        if is_terminal:
+            row.finished_at = datetime.now(timezone.utc)
+        if user_id is not None:
+            row.user_id = user_id
+        if platforms is not None:
+            row.platforms = platforms
+        if origin_package is not None:
+            row.origin_package = origin_package
+        if device_model is not None:
+            row.device_model = device_model
+        if rom is not None:
+            row.rom = rom
+        if app_env is not None:
+            row.app_env = app_env
+        if elapsed_ms is not None:
+            row.elapsed_ms = elapsed_ms
+        if platform_elapsed is not None:
+            row.platform_elapsed = platform_elapsed
+        if claimed_count is not None:
+            row.claimed_count = claimed_count
+        if trace_url is not None:
+            row.trace_url = trace_url
+    try:
+        db.commit()
+    except IntegrityError:
+        # 并发下另一请求刚插了同 trace_id → 唯一约束撞,回滚忽略(本就幂等)。
+        db.rollback()