Add tests, docs, and contributors for PRs #1463 and #1435

- Add tests for device_scale_factor (config + integration)
- Add tests for redirected_status_code (model + redirect + raw HTML)
- Document device_scale_factor in browser config docs and API reference
- Document redirected_status_code in crawler result docs and API reference
- Add TristanDonze and charlaie to CONTRIBUTORS.md
- Update PR-TODOLIST with session results

docs/md_v2/api/crawl-result.md

@@ -24,6 +24,7 @@ class CrawlResult(BaseModel):
     session_id: Optional[str] = None
     response_headers: Optional[dict] = None
     status_code: Optional[int] = None
+    redirected_status_code: Optional[int] = None
     ssl_certificate: Optional[SSLCertificate] = None
     dispatch_result: Optional[DispatchResult] = None
     ...
@@ -50,15 +51,23 @@ if not result.success:
     print(f"Crawl failed: {result.error_message}")
 ```
 
-### 1.3 **`status_code`** *(Optional[int])*  
-**What**: The page's HTTP status code (e.g., 200, 404).  
+### 1.3 **`status_code`** *(Optional[int])*
+**What**: The page's HTTP status code (e.g., 200, 404). When the page was reached via redirect, this is the status code of the **first** response in the redirect chain (e.g., 301 or 302).
 **Usage**:
 ```python
 if result.status_code == 404:
     print("Page not found!")
 ```
 
-### 1.4 **`error_message`** *(Optional[str])*  
+### 1.4 **`redirected_status_code`** *(Optional[int])*
+**What**: The HTTP status code of the **final** redirect destination. For a 302→200 redirect, `status_code` is 302 and `redirected_status_code` is 200. `None` for non-HTTP requests (raw HTML, local files).
+**Usage**:
+```python
+if result.status_code in (301, 302) and result.redirected_status_code == 200:
+    print(f"Redirected to {result.redirected_url} (OK)")
+```
+
+### 1.5 **`error_message`** *(Optional[str])*  
 **What**: If `success=False`, a textual description of the failure.  
 **Usage**:
 ```python