[#374] Add inner-ring event metrics

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

pkg/innerring/processors/netmap/processor.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/metrics"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/processors/netmap/nodevalidation/state"
 	cntClient "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client/container"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event"
@@ -72,6 +73,7 @@ type (
 	// and new epoch ticker, because it is related to contract.
 	Processor struct {
 		log           *logger.Logger
+		metrics       metrics.Register
 		pool          *ants.Pool
 		epochTimer    EpochTimerReseter
 		epochState    EpochState
@@ -93,6 +95,7 @@ type (
 	// Params of the processor constructor.
 	Params struct {
 		Log              *logger.Logger
+		Metrics          metrics.Register
 		PoolSize         int
 		NetmapClient     Client
 		EpochTimer       EpochTimerReseter
@@ -145,8 +148,14 @@ func New(p *Params) (*Processor, error) {
 		return nil, fmt.Errorf("ir/netmap: can't create worker pool: %w", err)
 	}
 
+	metricsRegister := p.Metrics
+	if metricsRegister == nil {
+		metricsRegister = metrics.DefaultRegister{}
+	}
+
 	return &Processor{
 		log:            p.Log,
+		metrics:        metricsRegister,
 		pool:           pool,
 		epochTimer:     p.EpochTimer,
 		epochState:     p.EpochState,