[#374] Add inner-ring event metrics

Signed-off-by: Alejandro Lopez <a.lopez@yadro.com>

pkg/innerring/processors/governance/processor.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/metrics"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client"
 	frostfscontract "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client/frostfs"
 	nmClient "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client/netmap"
@@ -75,6 +76,7 @@ type (
 	// Processor of events related to governance in the network.
 	Processor struct {
 		log           *logger.Logger
+		metrics       metrics.Register
 		pool          *ants.Pool
 		frostfsClient FrostFSClient
 		netmapClient  NetmapClient
@@ -92,7 +94,8 @@ type (
 
 	// Params of the processor constructor.
 	Params struct {
-		Log *logger.Logger
+		Log     *logger.Logger
+		Metrics metrics.Register
 
 		AlphabetState AlphabetState
 		EpochState    EpochState
@@ -130,11 +133,17 @@ func New(p *Params) (*Processor, error) {
 		return nil, fmt.Errorf("ir/governance: can't create worker pool: %w", err)
 	}
 
+	metricsRegister := p.Metrics
+	if metricsRegister == nil {
+		metricsRegister = metrics.DefaultRegister{}
+	}
+
 	// result is cached by neo-go, so we can pre-calc it
 	designate := p.MainnetClient.GetDesignateHash()
 
 	return &Processor{
 		log:           p.Log,
+		metrics:       metricsRegister,
 		pool:          pool,
 		frostfsClient: p.FrostFSClient,
 		netmapClient:  p.NetmapClient,