It's a public value like the APNs topic, so just fallback to this value
in push.yml. In this way we have one fewer field we need to maintain
consistently across multiple 1Password items.
- Rename script from apns-dev to push-dev (handles both APNs and FCM)
- Fetch credentials from Deploy/Fizzy Production (same as Kamal)
- Use _B64 env vars to avoid escaping issues with multiline keys
- Update bin/dev flag from --apns to --push
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>