posts: n8n v1→v2 migration, self-healing entitlements, TTS sidecars

Three new posts (EN + ZH twins, og + banner each):

- n8n-v1-to-v2-upgrade-gotchas (devops): the seven deprecations that
  surfaced upgrading 1.123.x → 2.40.1, decoded from the boot log —
  telemetry schema rejection, N8N_WEBHOOK_URL rename, internal runner
  deprecation, task timeout 300s→60s, two compression limits, v3
  storage rename, plus the DB override that silently disabled the
  AI sandbox.
- self-healing-digital-goods-entitlements (case-studies): the W1–W5
  NocoDB → n8n → AList entitlement lifecycle. Build-time code sharing
  for n8n Code nodes, MAX-expiry semantics, dry-run safety, daily
  drift repair, CORS-not-HMAC reasoning, and the public→internal
  NocoDB cascading-failure fix (504 → retry storm → 503).
- running-tts-as-a-service-with-token-sidecars (ai): a year-long TTS
  service built on two cron containers that refresh Azure/Google
  tokens into a shared file, with the speed/voice mapping layer.

banner-gen: center terminal body vertically so line counts shorter
than the fixed 690px panel don't leave a dead void at the bottom.
Verified via DOM measurement (gapAbove 104 / gapBelow 106).

scripts/og-gen/generate.mjs

@@ -144,6 +144,21 @@ const TERMINALS = {
       <div class="line"><span class="prompt">$</span><span class="cmd">wp plugin list · hre-ai-remix 0.0.1 → 0.0.22</span></div>
       <div class="line"><span class="prompt">&nbsp;</span><span class="err">404 …/wp-json/hre/v1<span class="hl">admin</span>/photos — rest_url() has no trailing slash</span></div>
       <div class="line"><span class="prompt">$</span><span class="cmd">fix = '/admin/…' · 58 commits · 4 were the AI</span><span class="fix">→ shipped ✓</span></div>`,
+
+    'n8n-v1-to-v2-upgrade-gotchas': `
+      <div class="line"><span class="prompt">$</span><span class="cmd">pull n8nio/n8n:2.40.1 · restart · upgrade took 90s</span></div>
+      <div class="line"><span class="prompt">&nbsp;</span><span class="err">telemetry schema: executions_data_save_on_error rejected</span></div>
+      <div class="line"><span class="prompt">$</span><span class="cmd">read the boot log · pin timeouts + limits</span><span class="fix">→ 7 fixed ✓</span></div>`,
+
+    'self-healing-digital-goods-entitlements': `
+      <div class="line"><span class="prompt">$</span><span class="cmd">nocodb → n8n W1–W5 → alist role scopes</span></div>
+      <div class="line"><span class="prompt">&nbsp;</span><span class="err">public hostname: 60s latency → nginx 504 → retry storm → 503</span></div>
+      <div class="line"><span class="prompt">$</span><span class="cmd">http://nocodb:10380 · 30ms · W4 repairs drift 03:00</span><span class="fix">→ self-healing ✓</span></div>`,
+
+    'running-tts-as-a-service-with-token-sidecars': `
+      <div class="line"><span class="prompt">$</span><span class="cmd">reading app → GET /webhook/mtts?pass=…&text=…</span></div>
+      <div class="line"><span class="prompt">&nbsp;</span><span class="err">azure token expires in ~10min · google in ~1h</span></div>
+      <div class="line"><span class="prompt">$</span><span class="cmd">2 cron sidecars write accesstoken.txt · 570s / 3500s</span><span class="fix">→ 1 year uptime ✓</span></div>`,
   };
 
 const DEFAULT_TERMINAL = `