feat: Implement HTTPX fallback in Cataloguemate scraper for enhanced reliability and add associated implementation plan and debug script.

implementation_plan.md

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+# Implementation Plan - Catalog Scraper Fix
+
+## Problem
+
+The catalog scraper (`cataloguemate_scraper.py`) fails to retrieve catalogs because the `browserless` service is likely being blocked or failing to connect (based on logs). However, the target site (`cataloguemate.fr`) is accessible via simple HTTP requests.
+
+## Proposed Changes
+
+### 1. Modify `app/services/cataloguemate_scraper.py`
+
+We will implement a fallback mechanism in `scrape_catalog_list`:
+
+- **Primary Method**: Continue using `browserless_service.get_page_content`.
+- **Fallback Method**: If `browserless` returns no content or fails, use `httpx.AsyncClient` to fetch the HTML directly.
+- **Parsing**: Use `BeautifulSoup` to parse the HTML from either source.
+
+#### [MODIFY] [cataloguemate_scraper.py](file:///c:/Users/Michael/VSCODE/Priceflow-1/app/services/cataloguemate_scraper.py)
+
+- Import `httpx` and `random` (for user-agents).
+- In `scrape_catalog_list`, add a `try/except` block or check for empty content.
+- If content is missing, call a new helper or inline `httpx` request with standard headers.
+
+## Verification Plan
+
+### Automated Verification
+
+Since we cannot run the full app locally (docker/dependencies issues), we will verify by code review and logic.
+
+### Manual Verification (User)
+
+1. User triggers the catalog update (via Admin or Scheduler).
+2. User checks logs to see if "Fallback to HTTP" message appears.
+3. User verifies that catalogs (e.g. B&M, Gifi) appear in the dashboard.