Revert "feat: replace Web Push with ntfy for medication reminders"

This reverts commit 1cada42370.

tools/gen_vapid.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python3
+"""Generate VAPID key pair for Web Push. Run: python tools/gen_vapid.py"""
+from __future__ import annotations
+
+from py_vapid import Vapid
+
+
+def main() -> None:
+    vapid = Vapid()
+    vapid.generate_keys()
+    private = vapid.private_pem.decode().strip()
+    public = vapid.public_key.decode().strip() if hasattr(vapid.public_key, "decode") else str(vapid.public_key)
+    print("Add these to your .env:\n")
+    print(f"VAPID_PRIVATE_KEY={private}")
+    print(f"VAPID_PUBLIC_KEY={public}")
+
+
+if __name__ == "__main__":
+    main()