Testnet mods

[Zacholme7]

Issue Addressed

N/A

Proposed Changes

This PR changes a few things needed to be able to run the client in ssv-mini

1. Adds a devenet dockerfile for building images specifically for ssv-mini
2. Adjusts the event processor to handle key registrations that are not ssz encoded on chain.
3. Write out enr to file

[dknopik]

LGTM

[Copilot]

Pull Request Overview

This PR implements modifications to support running the client in ssv-mini, including changes to key registration handling, ENR output, and minor instrumentation updates.

• Adjusts the event processor to handle key registrations that are and are not ssz encoded.
• Adds a new utility to write out the ENR to disk and updates discovery initialization accordingly.
• Updates instrumentation in the sync module to skip additional parameters.

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

File	Description
anchor/eth/src/event_processor.rs	Updated key data handling when data length is 704 and when it is not 704.
anchor/network/src/discovery.rs	Introduced ENR file writing functionality and adjusted discovery initialization.
anchor/eth/src/sync.rs	Modified instrumentation attributes to skip additional parameters.

[Copilot]

Consider handling errors from create_dir_all instead of ignoring them. Logging or propagating the error may help diagnose filesystem permission issues.

Suggested change

	let _ = std::fs::create_dir_all(dir);
	if let Err(e) = std::fs::create_dir_all(dir) {
	warn!(
	directory = format!("{:?}", dir),
	error = %e,
	"Could not create directory"
	);
	return;
	}

[jking-aus]

lgtm