feat: implement blobstreamx contract monitor

[rach-id]

Overview

The monitor implementation. It will show logs like:

$ blobstreamx-monitor  start --log.level debug --evm.rpc wss://sepolia.infura.io/ws/v3/f5e1862305274640b76f487f5bba437c --evm.contract-address 0x48B257EC1610d04191cC2c528d0c940AdbE1E439

1:18AM INF initializing watcher build_date= version=
1:19AM INF global meter setup namespace=blobstreamx-watcher service_instance_id_key=0x48B257EC1610d04191cC2c528d0c940AdbE1E439 service_name_key=blobstreamx-watcher
1:19AM INF starting watcher address=0x48B257EC1610d04191cC2c528d0c940AdbE1E439 rpc=wss://sepolia.infura.io/ws/v3/f5e1862305274640b76f487f5bba437c
1:33AM INF received new data root tuple root event data_commitment=81674f83534df75ede7bd736129bde4d439ca71a9937980395d967f1de611b1c end_block=564350 nonce=346 start_block=564258
1:33AM DBG incrementing metric

and will submit an event to the otel collector and can be visualized in grafana.

Checklist

• New and updated code has appropriate documentation
• New and updated code has new and/or updated testing
• Required CI checks are passing
• Visual proof for any user facing features like CLI or documentation updates
• Linked issues closed with keywords

[evan-forbes]

utack!