> v0.5.1 -> v0.5.2

## Summary

Replaced per-execution resource limits with centralized systemd slice management and removed Podman container dependencies, transitioning to a pure bubblewrap sandbox architecture.
<details>
<summary>翻譯</summary>
以集中式 systemd slice 取代逐次執行的資源限制設定，並移除 Podman 容器依賴，轉換為純 bubblewrap 沙箱架構。
</details>

## Changes

### REFACTOR
- Replace per-process systemd-run resource properties with shared `go-faas-slice` unit for centralized CPU/memory limits
- Remove commented-out container pool initialization code in main.go
- Remove utils import from command.go (no longer needed for inline resource config)

<details>
<summary>翻譯</summary>

- 以共用的 `go-faas-slice` 單元取代逐次執行的 systemd-run 資源屬性，集中管理 CPU/記憶體限制
- 移除 main.go 中已註解的容器池初始化程式碼
- 移除 command.go 中的 utils import（不再需要內聯資源配置）

</details>

### ADD
- Add `internal/sandbox/slice.go` to create and manage systemd user slice with configurable CPU/memory limits

<details>
<summary>翻譯</summary>

- 新增 `internal/sandbox/slice.go` 建立並管理具有可配置 CPU/記憶體限制的 systemd user slice

</details>

### REMOVE
- Delete `Dockerfile.runtime` (standard runtime container)
- Delete `Dockerfile.runtime.gpu` (CUDA-enabled runtime container)

<details>
<summary>翻譯</summary>

- 刪除 `Dockerfile.runtime`（標準執行環境容器）
- 刪除 `Dockerfile.runtime.gpu`（CUDA 執行環境容器）

</details>

### UPDATE
- Simplify `.env.example` by removing container-specific variables (MAX_CONTAINERS, GPU_ENABLED, etc.)

<details>
<summary>翻譯</summary>

- 簡化 `.env.example`，移除容器相關變數（MAX_CONTAINERS、GPU_ENABLED 等）

</details>

***

## Files Changed

| File | Status | Tag |
|------|--------|-----|
| `.env.example` | Modified | UPDATE |
| `Dockerfile.runtime` | Deleted | REMOVE |
| `Dockerfile.runtime.gpu` | Deleted | REMOVE |
| `README.md` | Modified | DOC |
| `README.zh.md` | Modified | DOC |
| `cmd/api/main.go` | Modified | REFACTOR |
| `internal/sandbox/command.go` | Modified | REFACTOR |
| `internal/sandbox/slice.go` | Added | ADD |

***

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