chore(l1,l2): disable printing of log targets depending on log level

[mpaulucci]

Motivation
Users using ethrex don't really care where the module comes from.

Description

• Removes the target if the log level is info or above
• Refactors the init_tracing function to be clearer
• Downgrades some logs

[Copilot]

Pull Request Overview

This PR reduces logging verbosity by downgrading several frequently-occurring log messages from debug or info level to trace level, and improves the logging configuration setup. The changes help reduce noise in production logs while maintaining detailed information for deep debugging when needed.

Key changes:

• Downgraded routine operational messages to trace level in transaction broadcasting, peer table management, and blockchain storage updates
• Refactored tracing initialization to disable target display and simplify the color/profiling layer configuration
• Added trace import to tx_broadcaster.rs to support the new log level

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
crates/networking/p2p/tx_broadcaster.rs	Downgraded broadcast operation logs to trace level and added trace import
crates/networking/p2p/discv4/peer_table.rs	Downgraded peer table reset message to trace level
crates/blockchain/blockchain.rs	Changed storage update log message from debug to trace with clearer wording
cmd/ethrex/initializers.rs	Refactored tracing initialization for clarity, disabled target display, and simplified layer composition

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[github-actions]

Lines of code report

Total lines added: 0
Total lines removed: 1
Total lines changed: 1

Detailed view

+-----------------------------------+-------+------+
| File                              | Lines | Diff |
+-----------------------------------+-------+------+
| ethrex/cmd/ethrex/initializers.rs | 453   | -1   |
+-----------------------------------+-------+------+