feat: Use generic HeaderTy for reth db get static-file headers

[sprites0]

Description

This PR adds support for custom headers in the reth db get static-file headers <N> command, to make it more consistent with other parts of StaticFileProviderRW which uses NodePrimitives::BlockHeader.

Motivation

This patch is particularly relevant for NodeBuilder API usages e.g., reth-hl, which will rely on a custom header type with a dedicated Compact trait implementation.

Example output

# target/debug/reth-hl db get static-file headers 1
2025-10-06T04:12:10.012167Z  INFO Initialized tracing, debug log directory: /root/.cache/reth/logs/hyperliquid
2025-10-06T04:12:10.045997Z  INFO Opening storage db_path="/root/.local/share/reth/hyperliquid/db" sf_path="/root/.local/share/reth/hyperliquid/static_files"
2025-10-06T04:12:10.100576Z  INFO Verifying storage consistency.
Header
{
  "inner": {
    "parentHash": "0xd8fcc13b6a195b88b7b2da3722ff6cad767b13a8c1e9ffb1c73aa9d216d895f0",
    "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
    "miner": "0x0000000000000000000000000000000000000000",
    "stateRoot": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
    "receiptsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
    "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
    "difficulty": "0x0",
    "number": "0x1",
    "gasLimit": "0x1e8480",
    "gasUsed": "0x0",
    "timestamp": "0x67b40034",
    "extraData": "0x",
    "mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "nonce": "0x0000000000000000",
    "baseFeePerGas": "0x5f5e100",
    "withdrawalsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
    "blobGasUsed": "0x0",
    "excessBlobGas": "0x0",
    "parentBeaconBlockRoot": "0x0000000000000000000000000000000000000000000000000000000000000000"
  },
  "extras": {
    "logs_bloom_with_system_txs": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
    "system_tx_count": 0
  }
}

BlockHash
"0xde151843548b88d06f201d86e860e45fbf07d49612f1934fba5746abd942fb01"

[shekhirin]

nice!