ci: ワークフロー統合と protobuf 検証ジョブの追加

[FRICK-ELDY]

• ci.yml.ignore を ci.yml に統合（pull_request・concurrency・各ジョブ）
• proto-verify: protoc / mix alchemy.gen.proto / format 後に git diff
• Rust fmt、Logger.warning、生成 .pb.ex と周辺の mix format 修正

[gemini-code-assist]

Code Review

This pull request primarily focuses on code formatting and style consistency across Elixir and Rust files. Key changes include updating deprecated Logger.warn/1 calls to Logger.warning/1 to align with modern Elixir standards, standardizing the syntax in generated Protobuf Elixir modules by adding parentheses to macro calls, and various whitespace and indentation adjustments to improve readability. I have no feedback to provide as the changes are stylistic or address deprecations.