The docs claimed ntfy keeps push metadata on your own infrastructure,
but the default NTFY_SERVER_URL is the public https://ntfy.sh cloud
service. Make explicit that push metadata (topic, notification title)
passes through ntfy.sh unless you self-host ntfy.
- 'No file limit' -> 100 MB default, configurable via max_upload_bytes
- 'No character limit' -> 'No 4,096-character limit like Telegram'
(hard frame-body cap: 1 MiB)
- Note that limits are set on the gateway side (hermes), not in the app
- Sync docs/playstore-listing.md (same overclaim)
- IRIS_PUSH_BACKEND now defaults to ntfy (keeps push metadata on your own
infrastructure); FCM is opt-in via IRIS_PUSH_BACKEND=fcm
- build_push_backend(): ntfy for empty/unknown names, FCM only on explicit 'fcm'
- gateway setup: warn when FCM is chosen (metadata routed via Google's servers)
- README: privacy note + dedicated push section; new docs/playstore-listing.md
with the FCM/ntfy privacy note for the Play Store listing
- docs: 00/02/03/08/12/16 + setup.md updated to ntfy-default wording
- tests: default-backend assertion updated (86/86 pass)