feat: editor_notes + /api/stats/live + tokens в getArticleBySlug

- БД: таблица editor_notes (title/content/author/tags/is_pinned/is_published)
- routes/notes.js: CRUD заметок редактора
- /api/stats/live: latest article, processing job, активность за 7 дней
- getArticleBySlug: JOIN с generation_jobs для tokens_in/out

src/config/db.js

@@ -142,6 +142,21 @@ const migrate = async () => {
     );
   `);
 
+  // editor_notes — короткие заметки от редактора-человека
+  await query(`
+    CREATE TABLE IF NOT EXISTS editor_notes (
+      id          SERIAL PRIMARY KEY,
+      title       VARCHAR(255),
+      content     TEXT NOT NULL,
+      author      VARCHAR(100) DEFAULT 'Редактор',
+      tags        JSONB DEFAULT '[]'::jsonb,
+      is_pinned   BOOLEAN DEFAULT false,
+      is_published BOOLEAN DEFAULT true,
+      created_at  TIMESTAMPTZ DEFAULT NOW(),
+      updated_at  TIMESTAMPTZ DEFAULT NOW()
+    );
+  `);
+
   // индексы
   await query(`
     CREATE INDEX IF NOT EXISTS idx_channels_user ON channels(user_id);
@@ -151,6 +166,7 @@ const migrate = async () => {
     CREATE INDEX IF NOT EXISTS idx_jobs_user ON generation_jobs(user_id);
     CREATE INDEX IF NOT EXISTS idx_articles_slug ON articles(slug);
     CREATE INDEX IF NOT EXISTS idx_articles_status_pub ON articles(status, published_at DESC);
+    CREATE INDEX IF NOT EXISTS idx_notes_pub ON editor_notes(is_published, created_at DESC);
   `);
 
   console.log('[DB] Migrations applied');