fix(db): require share_salt to be supplied by the daemon

server/Cargo.toml

@@ -167,3 +167,4 @@ nursery = { level = "warn", priority = -1 }
 pedantic = { level = "warn", priority = -1 }
 
 type_repetition_in_bounds = "allow"   # sometimes, it's better for readability this way
+unused_async_trait_impl = "allow"

server/crates/arbiter-server/migrations/2026-02-14-171124-0000_init/up.sql

@@ -56,7 +56,7 @@ create table if not exists operator (
 
     share blob not null,
     share_nonce blob not null,
-    share_salt blob not null default (randomblob(32)),
+    share_salt blob not null,
 
     created_at integer not null default(unixepoch ('now')),
     updated_at integer not null default(unixepoch ('now'))