feat(scripts): backfill Customer.add_time from raw_json

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

yunke-server/scripts/backfill_customer_add_time.py

@@ -0,0 +1,48 @@
+"""Backfill Customer.add_time from raw_json.addTime (no re-scrape).
+
+Iterates existing customer rows, parses raw_json.addTime (str or epoch) →
+add_time ms-epoch, updates in batches. Idempotent: skips rows where add_time
+is already set. WeChat rows have addTime; WhatsApp rows do not (createTime is
+owner-staff, not customer-add) — those stay NULL.
+"""
+import asyncio
+import time
+
+from sqlalchemy import select, update
+from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine
+
+from app.db import models  # noqa: F401
+from app.db.models import Customer
+from app.scraper.wechat import _parse_add_time
+
+BATCH = 200
+
+
+async def main(db_url: str = "sqlite+aiosqlite:///./smoke.db") -> None:
+    engine = create_async_engine(db_url)
+    sm = async_sessionmaker(engine, expire_on_commit=False)
+    done = 0
+    async with sm() as s:
+        rows = (
+            await s.execute(select(Customer.friend_id, Customer.raw_json, Customer.add_time))
+        ).all()
+        for fid, raw, existing in rows:
+            if existing or not raw:
+                continue
+            val = _parse_add_time(raw.get("addTime"))
+            if val is None:
+                continue
+            await s.execute(
+                update(Customer).where(Customer.friend_id == fid).values(add_time=val)
+            )
+            done += 1
+            if done % BATCH == 0:
+                await s.commit()
+                print(f"[{time.strftime('%H:%M:%S')}] {done} updated...")
+        await s.commit()
+    print(f"DONE — {done} customers got add_time")
+    await engine.dispose()
+
+
+if __name__ == "__main__":
+    asyncio.run(main())