feat: Introduce AI extraction schema with validation, prompt generation, and a verification script to improve price extraction reliability.

task.md

@@ -18,6 +18,15 @@ Implementing logic to generate unique timestamped filenames for screenshots to b
 - [x] Update `ItemService.delete_item` to clean up all related screenshots <!-- id: 6 -->
 - [x] Create `verify_fix_item_service.py` to test the new logic <!-- id: 5 -->
 
+## Current Focus
+
+Improving price extraction reliability for B&M Stores and others.
+
+- [x] Analyze `ai_schema.py` to check the extraction prompt <!-- id: 7 -->
+- [x] Improve `ScraperService._extract_text` to be more targeted (e.g. main content only) <!-- id: 8 -->
+- [x] Update AI prompt to better handle multiple prices (unit vs package) <!-- id: 9 -->
+- [x] Verify extraction logic with simulation script <!-- id: 10 -->
+
 ## Progress Log
 
 - Identified the issue: `ScraperService` overwrites `item_{id}.png`.
@@ -25,3 +34,6 @@ Implementing logic to generate unique timestamped filenames for screenshots to b
 - User approved plan.
 - Implemented filesystem scanning in `ItemService`.
 - Verified fix with `verify_fix_item_service.py` successfully.
+- Improved AI prompt to ignore unit prices (like "Prix au litre").
+- Enhanced text extraction to remove menu/footer noise.
+- Verified logic with `verify_extraction_logic.py` (simulated).