fix(growth): require a 1000-view baseline on the rate board

Keep small-base videos on the delta board only, and raise the smoothing prior to 1000 so videos that just clear the floor do not dominate the ranking.

project.md

@@ -681,14 +681,14 @@ d7 = (view_today - view_{today-7}) / 实际间隔天数
 r7 = (view_today - view_{today-7}) / max(view_{today-7}, 1)
 d1_published_today = view_today - 0          # 只进增量榜，不计算增速
 d1_imported_today  = view_today - view_open   # 需同日第二次采样
-sort_rate = Δ / (基线 + analytics.growth_rate_prior)  # 默认 prior=500，只用于增速榜排序
+sort_rate = Δ / (基线 + analytics.growth_rate_prior)  # 默认 prior=1000，只用于增速榜排序
 ```
 
 | 榜 | 口径 | 基数门槛 |
 |---|---|---|
 | 累计热度 | §8.1 | — |
 | 近 7 天播放增量 | `d7(view)` | — |
-| 近 7 天增速 | `r7(view)` | `view >= 200` |
+| 近 7 天增速 | `r7(view)` | 基线播放 `>= 1000` |
 | 互动率 | `(like+coin+fav)/view` | `view >= 100` |
 | 单项榜 | 7 项直接排序 | — |
 | UP 榜 | 按 `up_mid` 聚合 Σ/AVG | — |