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/signers/src/lib.rs

@@ -11,9 +11,11 @@ use ciphersuite::{group::GroupEncoding, Ciphersuite};
 use dalek_ff_group::Ristretto;
 use frost::dkg::ThresholdKeys;
 
-use serai_primitives::Signature;
-use serai_validator_sets_primitives::{Session, SlashReport};
-use serai_in_instructions_primitives::SignedBatch;
+use serai_primitives::{
+  crypto::Signature,
+  validator_sets::{Session, SlashReport},
+  instructions::SignedBatch,
+};
 
 use serai_db::{DbTxn, Db};