fix(sdk): coerce bytearray to bytes in process_request payload

[danh91]

Bug

sdk-tests CI job is failing on every new PR after mypy 2.0 was picked up by the runner:

```
modules/sdk/karrio/core/utils/helpers.py:177: error: Dict entry 0 has incompatible type "str": "bytes | bytearray"; expected "str": "bytes" [dict-item]
```

Root Cause

payload is annotated dict[str, bytes] (line 171), but the isinstance(raw, (bytes, bytearray)) branch assigns the narrowed bytes | bytearray:

```python
payload: dict[str, bytes] = {}
...
elif isinstance(raw, (bytes, bytearray)):
payload = dict(data=raw) # bytearray is not bytes
```

mypy 1.x accepted this; mypy 2.0 (now installed by bin/setup-sdk-env) does not.

Fix

One-line coercion to satisfy the declared type:

```python
payload = dict(data=bytes(raw))
```

bytes(bytes_instance) is a cheap no-op-equivalent and bytes(bytearray) produces equivalent bytes. Downstream urllib.request.Request requires bytes-like data anyway, so behavior is unchanged.

Tests

• Type fix verified against the exact mypy 2.0 error reported in CI logs (sdk-tests (3.12) job 75188611968).
• No behavior change for any caller path (bytes / bytearray / str / dict / fallback).

Why a separate PR

Spotted while CI was failing on an unrelated docs PR (#1080). Splitting this out so it can land independently and unblock all open PRs.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
karrio-web	Ready	Preview, Comment	May 9, 2026 11:04pm