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

backend/internal/database/migrations/000001_init.up.sql

@@ -21,7 +21,7 @@ CREATE TABLE user_assets (
 CREATE TABLE sources (
     id         UUID PRIMARY KEY DEFAULT gen_random_uuid(),
     name       TEXT NOT NULL,
-    type       TEXT NOT NULL CHECK (type IN ('bloomberg', 'stocktwits')),
+    type       TEXT NOT NULL CHECK (type IN ('bloomberg', 'stocktwits', 'reuters', 'watcherguru')),
     enabled    BOOLEAN NOT NULL DEFAULT TRUE,
     created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
 );
@@ -97,7 +97,7 @@ CREATE INDEX idx_user_assets_user_id ON user_assets(user_id);
 -- Sources initiales
 INSERT INTO sources (name, type, enabled) VALUES
     ('Bloomberg', 'bloomberg', TRUE),
-    ('StockTwits', 'stocktwits', TRUE);
+    ('Yahoo Finance', 'stocktwits', TRUE);
 
 -- Paramètres par défaut
 INSERT INTO settings (key, value) VALUES