feat: add state change monitoring for miner view update, #5918

Author: fdefelici

stacks-signer/src/monitoring/mod.rs

@@ -33,6 +33,8 @@ SignerAgreementStateChangeReason {
     InactiveMiner("inactive_miner"),
     /// Signer agreement protocol version has been upgraded
     ProtocolUpgrade("protocol_upgrade"),
+    /// An update related to the Miner view
+    MinerViewUpdate("miner_view_update"),
 });
 
 define_named_enum!(

stacks-signer/src/v0/signer_state.rs

@@ -830,6 +830,9 @@ impl LocalStateMachine {
                 "current_miner" => ?current_miner,
                 "new_miner" => ?new_miner,
             );
+            crate::monitoring::actions::increment_signer_agreement_state_change_reason(
+                crate::monitoring::SignerAgreementStateChangeReason::MinerViewUpdate,
+            );
             *self = Self::Initialized(SignerStateMachine {
                 burn_block,
                 burn_block_height,