feat(zero): Zero notes — AI persona for @zeropostru daily posts

Adds character-driven AI-generated notes pipeline parallel to articles:
  - migration: zero_notes table (channel-scoped, status flow draft→approved→published)
  - services/zeroPrompt.js — 12 theme buckets, few-shots, anti-repeat by bucket,
    sha256 theme_hash for dedup
  - services/zeroNotes.js — generateDraft/approve/skip/edit/autoApproveOldDrafts
  - services/zeroNotesRunner.js — TG publication with multipart pose images,
    FOR UPDATE SKIP LOCKED claim, retry up to 3 attempts
  - workers/zeroNotesScheduler.js — 13:00 MSK generate, 07:00 MSK auto-approve,
    publish runner every 60s
  - routes/zero.js (public, no secret) — character bio + published notes for site
  - routes/zeroAdmin.js — full CRUD + manual generate button + regenerate

Settings (app_settings):
  ZERO_NOTES_CHANNEL_IDS  — csv int, channels to post for (required to enable)
  ZERO_NOTES_MODEL        — defaults to AI_MODEL_POST
  ZERO_SITE_URL_BASE      — optional, adds 'Open on site' inline button

src/workers/zeroNotesScheduler.js

@@ -0,0 +1,99 @@
+/**
+ * zeroNotesScheduler.js — расписание для заметок Зеро.
+ *
+ * Запускается из index.js: require('./src/workers/zeroNotesScheduler').start();
+ *
+ * Тик каждые 60 сек, в МСК:
+ *   - 13:00 → generateDraft для каждого активного канала (планирует на завтра 13:00)
+ *   - 07:00 → autoApproveOldDrafts (переводит вчерашние draft в approved)
+ *   - публикация в TG — отдельный раннер (следующий шаг)
+ *
+ * Защита от двойного запуска: in-memory флаг по YMD-минуте.
+ */
+
+const zeroNotes  = require('../services/zeroNotes');
+const zeroRunner = require('../services/zeroNotesRunner');
+
+const TICK_MS = 60_000;
+
+// Отметка последнего успешного тика по slot'у: { generate: '2026-06-19T13:00', approve: '2026-06-19T07:00' }
+const lastRun = {};
+
+const GENERATE_HOUR_MSK = 13;
+const APPROVE_HOUR_MSK  = 7;
+
+function slotKey(ymd, hour) {
+  return `${ymd}T${String(hour).padStart(2, '0')}:00`;
+}
+
+async function runGeneration(ymd) {
+  const key = slotKey(ymd, GENERATE_HOUR_MSK);
+  if (lastRun.generate === key) return;
+  lastRun.generate = key;
+
+  const channelIds = await zeroNotes.getActiveChannelIds();
+  if (!channelIds.length) {
+    console.log('[zeroNotes/scheduler] 13:00 МСК — нет активных каналов (ZERO_NOTES_CHANNEL_IDS пусто)');
+    return;
+  }
+  console.log(`[zeroNotes/scheduler] 13:00 МСК — генерация для каналов: ${channelIds.join(', ')}`);
+  for (const channelId of channelIds) {
+    try {
+      const saved = await zeroNotes.generateDraft(channelId);
+      if (saved) {
+        console.log(`[zeroNotes/scheduler] channel=${channelId} → draft #${saved.id}, scheduled=${saved.scheduled_at?.toISOString?.() || saved.scheduled_at}`);
+      }
+    } catch (err) {
+      console.error(`[zeroNotes/scheduler] channel=${channelId} generation FAILED: ${err.message}`);
+    }
+  }
+}
+
+async function runAutoApprove(ymd) {
+  const key = slotKey(ymd, APPROVE_HOUR_MSK);
+  if (lastRun.approve === key) return;
+  lastRun.approve = key;
+
+  console.log(`[zeroNotes/scheduler] 07:00 МСК — авто-одобрение драфтов`);
+  try {
+    await zeroNotes.autoApproveOldDrafts();
+  } catch (err) {
+    console.error(`[zeroNotes/scheduler] auto-approve FAILED: ${err.message}`);
+  }
+}
+
+async function tick() {
+  const { hour, ymd } = zeroNotes.nowMsk();
+  try {
+    if (hour === GENERATE_HOUR_MSK) await runGeneration(ymd);
+    if (hour === APPROVE_HOUR_MSK)  await runAutoApprove(ymd);
+    // публикация approved-заметок в TG (каждую минуту)
+    const published = await zeroRunner.publishReady({ limit: 3 });
+    if (published > 0) console.log(`[zeroNotes/scheduler] published ${published} note(s)`);
+  } catch (err) {
+    console.error(`[zeroNotes/scheduler] tick error: ${err.message}`);
+  }
+}
+
+let intervalRef = null;
+
+function start() {
+  if (intervalRef) {
+    console.log('[zeroNotes/scheduler] already started');
+    return;
+  }
+  intervalRef = setInterval(tick, TICK_MS);
+  // первый тик через 30 сек после старта (даём engine стабильно подняться)
+  setTimeout(tick, 30_000);
+  console.log(`[zeroNotes/scheduler] started, tick every ${TICK_MS / 1000}s, ` +
+    `generate=${GENERATE_HOUR_MSK}:00 MSK, auto-approve=${APPROVE_HOUR_MSK}:00 MSK`);
+}
+
+function stop() {
+  if (intervalRef) {
+    clearInterval(intervalRef);
+    intervalRef = null;
+  }
+}
+
+module.exports = { start, stop, tick, runGeneration, runAutoApprove };