Get all processors to compile again

Requires splitting `serai-cosign` into `serai-cosign` and `serai-cosign-types`
so the processor don't require `serai-client/serai` (not correct yet).

processor/scanner/src/report/db.rs

@@ -1,6 +1,6 @@
 use serai_db::{Get, DbTxn, create_db};
 
-use serai_validator_sets_primitives::Session;
+use serai_primitives::validator_sets::Session;
 
 create_db!(
   ScannerBatch {