internal/debug: add integration with Grafana Pyroscope #33623

[gzliudan]

Proposed changes

This adds support for Grafana Pyroscope, a continuous profiling solution.
The client is configured similarly to metrics, i.e. run

 geth --pyroscope --pyroscope.server=https://...

Ref: ethereum#33623

Types of changes

What types of changes does your code introduce to XDC network?
Put an ✅ in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)
• Regular KTLO or any of the maintaince work. e.g code style
• CICD Improvement

Impacted Components

Which part of the codebase this PR will touch base on,

Put an ✅ in the boxes that apply

• Consensus
• Account
• Network
• Geth
• Smart Contract
• External components
• Not sure (Please specify below)

Checklist

Put an ✅ in the boxes once you have confirmed below actions (or provide reasons on not doing so) that

• This PR has sufficient test coverage (unit/integration test) OR I have provided reason in the PR description for not having test coverage
• Provide an end-to-end test plan in the PR description on how to manually test it on the devnet/testnet.
• Tested the backwards compatibility.
• Tested with XDC nodes running this version co-exist with those running the previous version.
• Relevant documentation has been updated as part of this PR
• N/A

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[Copilot]

Pull request overview

This pull request adds integration with Grafana Pyroscope, a continuous profiling platform, to enable comprehensive runtime profiling of the XDPoSChain node. The implementation allows users to collect and push CPU, memory, goroutine, mutex, and block profiling data to a Pyroscope server for analysis.

Changes:

• Added Pyroscope profiling support with configurable server URL, authentication, and custom tags
• Integrated Pyroscope lifecycle management into the application's debug setup and exit handlers
• Updated dependencies to include grafana/pyroscope-go v1.2.7 and related packages

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 4 comments.

File	Description
internal/debug/pyroscope.go	New file implementing Pyroscope integration with flag definitions, initialization, and logger wrapper
internal/debug/flags.go	Integrated Pyroscope flags into the debug flags list and added startup/shutdown hooks
go.mod	Added pyroscope-go v1.2.7 dependency and updated testify to v1.10.0
go.sum	Updated checksums for new and updated dependencies

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