Add 0.0.1 changelog entry

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: iamlopes-eng

CHANGES.md

@@ -4,3 +4,14 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [0.0.1] - 2026-04-10
+
+### Added
+
+- `asimov-ethereum-fetcher` CLI binary for fetching Ethereum block data by URL.
+- `BlockUrl` type for parsing and resolving Ethereum block URLs (e.g. `eth://mainnet/12345678`).
+- Support for Ethereum networks: `mainnet`, `sepolia`, and `holesky` via public RPC endpoints.
+- JSON and JSONL output formats via `--output jsonl` flag.
+- `--version` and `--license` flags via `clientele` standard options.
+- Integration with `asimov-module` for argument parsing and optional tracing support.