chore(v1.1.7): version bumps + CHANGELOG

- workspace 1.1.6 → 1.1.7
- SDK schema 1.7 → 1.8 (SecretsService, EmailService, TriggerEvent::Email)
- dashboard 0.12.0 → 0.13.0
- CHANGELOG entry: secrets, outbound email, inbound email, retroactive
  dead_letter fix note, realtime-key encryption migration (+ v1.1.8 drop)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

dashboard/package.json

@@ -1,6 +1,6 @@
 {
 	"name": "picloud-dashboard",
-	"version": "0.12.0",
+	"version": "0.13.0",
 	"private": true,
 	"type": "module",
 	"scripts": {