copy the cache's pull facts to each hive and create them in the in-swarm cache

the in-swarm cache stores its address, name and public key beside its tokens, create-only. swarm-controller copies the four cache facts to swarm/hives/<hive>/attic/* every five minutes, with read on the sources and write on the copies. part 1 of 3: nothing reads the copies until the hive reader and probe land.

swarm-controller/src/main.rs

@@ -37,6 +37,7 @@ mod agents_md;
 mod agents_md_initial;
 mod alerts;
 mod archetypes;
+mod attic_copy;
 mod auth;
 mod builder;
 mod claude_login;