release-tool 0.4.0

Configuration-driven release lifecycle for computed-parameter repositories
Documentation 
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# Cargo registry consumption

## Interface

adopter 通过 Cargo registry 获取 released `release-tool` crate，不安装 global binary：

```text
adopter repository
├── release.toml
├── Cargo.lock                    # exact crate version + registry checksum
├── tooling/release-tool-runner/
│   ├── Cargo.toml
│   └── src/main.rs
└── justfile
```

```toml
# tooling/release-tool-runner/Cargo.toml

[package]
name = "release-tool-runner"
version = "0.0.0"
edition = "2024"
publish = false

[dependencies]
# Cargo compatibility range: >=0.4.0, <0.5.0
release-tool = "0.4"
```

```rust
// tooling/release-tool-runner/src/main.rs

fn main() -> std::process::ExitCode {
    release_tool::cli::entrypoint()
}
```

```just
publish *args:
    cargo run --release --locked \
        -p release-tool-runner -- publish {{ args }}
```

publish 入口不使用 `--quiet`。首次 fetch/compile 可能需要时间，Cargo progress 是运行状态与
toolchain/network/dependency 故障的必要诊断信息。

## Acquisition contract

```text
first run
  Cargo reads the committed lock
  -> fetch exact released crate + checksum from registry
  -> compile release-tool + runner
  -> cache source/build output
  -> execute CLI lifecycle

later runs
  reuse the same locked implementation and build cache
  -> execute CLI lifecycle
```

`release-tool` 不自行下载或替换自己。Cargo registry 是 acquisition adapter，`Cargo.lock` 是
resolved-version seam。GitHub Release binary、mutable Git branch 和 raw `rev` 都不属于 adopter
interface。

## Version identities

```text
Cargo.toml requirement: release-tool = "0.4"
  声明 compatible implementation line（>=0.4.0, <0.5.0）

Cargo.lock
  记录本次实际执行的 exact crate version、registry source 与 checksum

release.toml.required_version
  声明当前 config shape 需要的 minimum release-tool capability

ReleasePlan.tool_version
  记录本次实际执行的 crate version
```

这三个约束不能合并：compatibility range 不是 resolved version，minimum config capability 也不是
dependency selector。

target dependencies 与 OCI image publication capability 要求
`required_version = "0.3.0"`。当前 `0.4` runner compatibility line 继续读取该 config shape；
Cargo registry requirement、committed lock 与 minimum config capability 仍是三个独立职责。

## Compatibility policy

```text
0.2.z
  backward-compatible fixes / additive behavior
  adopter Cargo.toml 不变

0.3.0
  breaking Rust interface、config semantics 或 lifecycle contract
  adopter 必须显式迁移 dependency range

0.4.0
  current Rust / CLI compatibility line；release.toml 0.3 schema 保持兼容
  adopter 必须显式迁移 dependency range

1.x（interface 稳定后）
  normal SemVer minor/patch compatibility
```

## Upgrade

不在 `publish` 运行时解析 `latest`。否则同一 project commit 的两次 recovery 可能使用不同
implementation，SemVer compatibility 也不保证 artifact bytes 相同。

upgrade 是一个自动生成、可 review 的 lockfile change：

```text
release-tool publishes compatible 0.4.z
  -> dependency bot runs cargo update -p release-tool
  -> PR contains Cargo.lock change
  -> adopter CI verifies release integration
  -> compatible update may auto-merge
```

```bash
cargo update -p release-tool
cargo test --locked -p release-tool-runner
```

`--locked` 是 publish interface 的一部分；发布命令不会隐式升级工具。breaking release 必须同时
修改 runner manifest、Cargo.lock 和需要变化的 `release.toml`。