Implement system performance and resource utilization metrics

[mpetrun5]

Implement metrics that track resource and performance usage.

Implementation details

Reference document: https://docs.google.com/document/d/14zTwqI9upFo-TcBA-1avXpGLAKdONDWsQ9IK9CPDwvU/edit

These metrics monitor the relayer's resource usage and performance.

CPU Usage (sygma_relayer_cpu_usage_percent):

• Description: CPU usage percentage.
• Type: Gauge

Memory Usage (sygma_relayer_memory_usage_bytes):

• Description: Memory usage in bytes.
• Type: Gauge

Disk Usage (sygma_relayer_disk_usage_bytes):

• Description: Disk space used by the relayer.
• Type: Gauge

Network I/O (sygma_relayer_network_io_bytes_total):

Description: Total network input/output in bytes.
Type: Counter

Open File Descriptors (sygma_relayer_open_file_descriptors):

Description: Number of open file descriptors.
Type: Gauge

Go Routines (sygma_relayer_go_routines):

Description: Number of Go routines running.
Type: Gauge

Garbage Collection (sygma_relayer_gc_duration_seconds):

Description: Duration of garbage collection cycles.
Type: Histogram

Create a cronjob service that periodically updates runtime metrics.
https://pkg.go.dev/runtime for metrics.

Testing details

• check Prometheus metrics when running e2e tests

Acceptance Criteria

• message processing metrics exported though Opentelemetry