관리자 통계 대시보드 개선 및 v1.9.6 반영

통계 추이 차트 공통화, 유입 스택 막대, 집계 시작일 고정, traffic API 오류 수정, deploy 문서 정리를 포함한다.

Co-authored-by: Cursor <cursoragent@cursor.com>

db/migrations/059_post_analytics_traffic_daily.sql

@@ -0,0 +1,37 @@
+CREATE TABLE IF NOT EXISTS post_analytics_traffic_daily (
+  day DATE NOT NULL,
+  post_id UUID NOT NULL REFERENCES posts(id) ON DELETE CASCADE,
+  source_group TEXT NOT NULL,
+  source_name TEXT NOT NULL,
+  device_type TEXT NOT NULL,
+  os_name TEXT NOT NULL,
+  keyword TEXT NOT NULL DEFAULT '',
+  page_views INTEGER NOT NULL DEFAULT 0,
+  visitors INTEGER NOT NULL DEFAULT 0,
+  PRIMARY KEY (day, post_id, source_group, source_name, device_type, os_name, keyword)
+);
+
+CREATE INDEX IF NOT EXISTS post_analytics_traffic_daily_post_day_idx
+  ON post_analytics_traffic_daily (post_id, day DESC);
+
+CREATE INDEX IF NOT EXISTS post_analytics_traffic_daily_source_idx
+  ON post_analytics_traffic_daily (source_group, source_name);
+
+ALTER TABLE analytics_daily_visitors
+  DROP CONSTRAINT IF EXISTS analytics_daily_visitors_scope_check;
+
+ALTER TABLE analytics_daily_visitors
+  ADD CONSTRAINT analytics_daily_visitors_scope_check CHECK (scope IN ('site', 'post', 'page', 'traffic', 'post_traffic'));
+
+CREATE UNIQUE INDEX IF NOT EXISTS analytics_daily_visitors_post_traffic_uidx
+  ON analytics_daily_visitors (
+    day,
+    post_id,
+    visitor_hash,
+    source_group,
+    source_name,
+    device_type,
+    os_name,
+    keyword
+  )
+  WHERE scope = 'post_traffic';