Write a memory

Writes a plaintext memory. The content is encrypted server-side with a key derived from your API key. Fee: 0.001 AIC. Maximum 19936 bytes of UTF-8 text (a single on-chain transaction); larger writes are rejected with 413 and no charge. The event_hash is computed when the memory is synced to the chain (~30 s later), not at write time — see the note on evidence in Project Brain.