Dead Drop API v1

Privacy-focused, ephemeral data-sharing API v1. Provides CRUD operations for drops (text-only ephemeral shares), random unused drop-name generation, availability checks, and version history. Free tier drops are 10KB with a 7-day lifespan; Deep tier drops are 4MB with a 90-day lifespan. Private drops use client-side AES-GCM encryption (zero-knowledge); public drops are plaintext.