chore(l1): move FD limit before storage initialization

[rodrigo-o]

Motivation

We were setting the FD limit after the storage initialization, which made the node unable to start if we stopped it after a sync.

Description

Just move the FD limit before the storage setup

[Copilot]

Pull Request Overview

This PR fixes a startup issue where the node fails to restart after being stopped during sync by moving the file descriptor (FD) limit setting before storage initialization.

• Move raise_fd_limit()? call from after metrics initialization to before storage setup
• Ensures FD limits are properly configured before any storage operations that might require file handles

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[rodrigo-o]

This was the log after starting an already synced node:

2025-10-13T14:47:14.460826Z  INFO ethrex::utils: ══════════════════════════════════════════════════════════════════════
2025-10-13T14:47:14.460846Z  INFO ethrex::utils: NETWORK CONFIGURATION
2025-10-13T14:47:14.460849Z  INFO ethrex::utils: ══════════════════════════════════════════════════════════════════════
2025-10-13T14:47:14.460887Z  INFO ethrex::utils: Chain ID: 1 (mainnet)
2025-10-13T14:47:14.460889Z  INFO ethrex::utils: 
2025-10-13T14:47:14.460890Z  INFO ethrex::utils: Network is post-merge
2025-10-13T14:47:14.460892Z  INFO ethrex::utils: 
2025-10-13T14:47:14.460893Z  INFO ethrex::utils: Post-Merge hard forks (timestamp based):
2025-10-13T14:47:14.460895Z  INFO ethrex::utils: - Shanghai: @1681338455
2025-10-13T14:47:14.460896Z  INFO ethrex::utils: - Cancun: @1710338135
2025-10-13T14:47:14.460898Z  INFO ethrex::utils: - Prague: @1746612311
2025-10-13T14:47:14.460899Z  INFO ethrex::utils: - Osaka: @1764798551
2025-10-13T14:47:14.460901Z  INFO ethrex::utils: 
2025-10-13T14:47:14.519490Z  INFO ethrex::utils: Genesis Block Hash: d4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3
2025-10-13T14:47:14.519503Z  INFO ethrex::utils: ══════════════════════════════════════════════════════════════════════
2025-10-13T14:47:14.519517Z  INFO ethrex_storage::store: Opening storage engine engine=RocksDB path="/home/admin/.local/share/ethrex"
2025-10-13T14:47:14.527617Z  INFO ethrex_storage::store_db::rocksdb: Found existing column families: ["default", "transaction_locations", "pending_blocks", "block_numbers", "receipts", "canonical_block_hashes", "headers", "state_trie_nodes", "storage_tries_nodes", "snap_state", "invalid_ancestors", "chain_data", "account_codes", "bodies"]

thread 'main' panicked at cmd/ethrex/initializers.rs:156:42:
Failed to create Store: Custom("Failed to open RocksDB: IO error: While open a file for random read: /home/admin/.local/share/ethrex/003579.sst: Too many open files")
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Now, they are working