feat: add sources to retrieve news and divide the IA reflexions in 2 steps to limit the number of news

backend/internal/database/migrations/000004_schedule.up.sql

@@ -0,0 +1,17 @@
+CREATE TABLE scrape_schedules (
+    id          UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    day_of_week SMALLINT NOT NULL CHECK (day_of_week BETWEEN 0 AND 6),
+    hour        SMALLINT NOT NULL CHECK (hour BETWEEN 0 AND 23),
+    minute      SMALLINT NOT NULL DEFAULT 0 CHECK (minute BETWEEN 0 AND 59),
+    UNIQUE (day_of_week, hour, minute)
+);
+
+-- Planning par défaut : lun-ven à 6h et 15h, week-end à 6h uniquement
+INSERT INTO scrape_schedules (day_of_week, hour, minute) VALUES
+    (1, 6, 0), (1, 15, 0),
+    (2, 6, 0), (2, 15, 0),
+    (3, 6, 0), (3, 15, 0),
+    (4, 6, 0), (4, 15, 0),
+    (5, 6, 0), (5, 15, 0),
+    (6, 6, 0),
+    (0, 6, 0);