feat(l1): upgrade execution breakdown pie chart and add new panels

[rodrigo-o]

Motivation

We needed more granular panels to analyze the breakdown of execution for performance decisions.

Description

This PR use the current instrumentation to:

• Update the pie char of execution
• Add a diff measurement between execution and merkleization to understand the work of the execute_block_pipeline function
• Add a deagregated series by block showing the different instrumentations available today
• Maintain all of them in the previous Block Execution Breakdown row and repeat them vertically across instances

Note for running it locally:

After #5088 we needed to re-labeling our local instances to avoid duplicated panels that repeat across instances. This requires prometheus to be restarted to pick up the new labeling, one way to check this out is make look at intances, if ethereum-metrics-exporte appears there, we need to restart prometheus, only localhost should be there locally.

Bad (needs restarting prometheus)	Good

Next steps:

• Naming is not optimal, but changing it would require breaking the panel for instances not updated to this PR. We want first to test it with all instances and make sure the panels are useful and change the names afterwards, here is an issue for tracking that: Rename function instrumentation to be consistent #5219

Closes #5218

[rodrigo-o]

We are not instrumenting other non-pipeline related functions, if we want to do so we might need to do it in a following PR.

[rodrigo-o]

This was already instrumented at handle_merkleization, if it was intended to be part of the non-pipeline instrumentation, we need to do it in a follow-up.

[github-actions]

Lines of code report

Total lines added: 1
Total lines removed: 3
Total lines changed: 4

Detailed view

+-------------------------------------------+-------+------+
| File                                      | Lines | Diff |
+-------------------------------------------+-------+------+
| ethrex/crates/blockchain/blockchain.rs    | 1314  | +1   |
+-------------------------------------------+-------+------+
| ethrex/crates/storage/store.rs            | 1520  | -1   |
+-------------------------------------------+-------+------+
| ethrex/crates/storage/store_db/rocksdb.rs | 1595  | -1   |
+-------------------------------------------+-------+------+
| ethrex/crates/vm/backends/mod.rs          | 166   | -1   |
+-------------------------------------------+-------+------+

[Copilot]

Pull Request Overview

This PR reorganizes tracing instrumentation for performance monitoring by moving the "Block DB update" trace span from the storage layer to the blockchain layer, and removes redundant instrumentation from the VM execution path. Additionally, it includes significant Grafana dashboard enhancements for better block execution breakdown visualization.

• Relocated "Block DB update" instrumentation from rocksdb.rs to blockchain.rs::store_block for more accurate monitoring
• Removed instrumentation from execute_block and apply_account_updates_batch to reduce overhead
• Enhanced Grafana dashboard with collapsed block execution breakdown section containing multiple detailed panels

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
crates/vm/backends/mod.rs	Removed #[instrument] from execute_block method
crates/storage/store_db/rocksdb.rs	Removed inline tracing span for "Block DB update"
crates/storage/store.rs	Removed #[instrument] from apply_account_updates_batch and cleaned up unused instrument import
crates/blockchain/blockchain.rs	Added #[instrument] to store_block method to track "Block DB update"
metrics/provisioning/grafana/dashboards/common_dashboards/ethrex_l1_perf.json	Enhanced dashboard with collapsed block execution breakdown section, improved queries for execution vs merkleization analysis, and added deaggregated block-by-block execution visualization

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