feat: add X-Client-Id header with python-sdk-<version> format (#123)

# feat: add X-Client-Id header with python-sdk-<version> format

## Summary
This PR adds automatic inclusion of an `X-Client-Id` header to all API
requests made by the Python SDK. The header value follows the format
`python-sdk-<version>` where version is dynamically imported from
`vlmrun.version.__version__`. The implementation allows users to
override the default header by providing their own `X-Client-Id` in the
request headers.

**Key changes:**
- Import version from `vlmrun.version` for dynamic header value
- Add `X-Client-Id` header to `_request_with_retry` method in
`APIRequestor` class
- Header is only added if not already present, allowing user override
- Uses format `python-sdk-{__version__}` as specified in requirements

## Review & Testing Checklist for Human
- [ ] **Verify version import**: Confirm that
`vlmrun.version.__version__` correctly imports the current SDK version
- [ ] **Test header override**: Verify that providing `X-Client-Id` in
request headers properly overrides the default value
- [ ] **End-to-end API testing**: Make actual API calls and inspect
request headers to ensure `X-Client-Id` appears with correct format
(e.g., `python-sdk-0.3.3`)
- [ ] **Import style check**: Ensure the version import follows the
project's import ordering conventions

### Notes
- This change affects all API requests made through the SDK
- Part of broader effort to add X-Client-Id headers across all VLM Run
SDKs and integrations
- Session:
https://app.devin.ai/sessions/065534cd1a9846fe8e14cd964383de66
- Requested by: @Mirajul-Mohin

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: [email protected] <[email protected]>

Author: devin-ai-integration[bot]

vlmrun/client/base_requestor.py

@@ -6,6 +6,8 @@
 if TYPE_CHECKING:
     from vlmrun.types.abstract import VLMRunProtocol
 
+from vlmrun.version import __version__
+
 import requests
 from tenacity import (
     retry,
@@ -126,6 +128,9 @@ def _request_with_retry():
             if self._client.api_key:
                 _headers["Authorization"] = f"Bearer {self._client.api_key}"
 
+            if "X-Client-Id" not in _headers:
+                _headers["X-Client-Id"] = f"python-sdk-{__version__}"
+
             # Build full URL
             full_url = urljoin(self._base_url.rstrip("/") + "/", url.lstrip("/"))