feat(catalog): supplier catalog cleanup, fuzzy matching, and navigation fixes

- Cleaned 137+ fake engine-displacement models from supplier imports
  (v3/v4 scripts: Chevrolet, Ford, Chrysler, Dodge, Jeep, Nissan, etc.)
- Removed 1,251+ corrupted models (INT. prefixes, year-suffix, torque specs,
  empty names, trailing-year variants)
- Migrated supplier tables to master DB (supplier_catalog,
  supplier_catalog_compat, supplier_catalog_interchange)
- Fixed _get_mye_ids_with_parts() to query supplier_catalog_compat from
  master DB so supplier-only vehicles appear for all tenants
- Added fuzzy model matcher with parenthesis stripping, noise suffix removal,
  compact matching, prefix/substring fallback, model aliases, and ±3 year
  proximity
- Matched compat rows: KEEP GREEN +14,152, KNADIAN +3,021, VAZLO +127,500,
  LUK +477, RAYBESTOS +1,743
- Added KNADIAN catalog importer with year-range expansion and future-year
  filtering
- Added VAZLO catalog importer with position parsing and SKU-in-model cleanup
- Added Keep Green, LUK, Yokomitsu, Raybestos catalog importers
- Cache clearing after cleanups (_classify_cache_*, nexus:mye_ids:*,
  nexus:brand_mye_counts:*)

Final match rates:
- KEEP GREEN: 90.3%
- VAZLO: 93.6%
- YOKOMITSU: 100.0%
- KNADIAN: 57.4%
- LUK: 51.0%
- RAYBESTOS: 55.9%

pos/services/meli_service.py

@@ -167,6 +167,23 @@ class MeliService:
     def close_item(self, item_id: str) -> dict:
         return self.update_item(item_id, {"status": "closed"})
 
+    # ─── Questions & Answers ─────────────────────────────────────────────
+
+    def get_questions(self, item_id: str, status: str = None, offset: int = 0, limit: int = 50) -> dict:
+        params = {"item_id": item_id, "offset": offset, "limit": limit}
+        if status:
+            params["status"] = status
+        return self._request("GET", "/questions/search", params=params)
+
+    def get_question(self, question_id: str) -> dict:
+        return self._request("GET", f"/questions/{question_id}")
+
+    def answer_question(self, question_id: str, text: str) -> dict:
+        return self._request("POST", "/answers", json_payload={"question_id": question_id, "text": text})
+
+    def delete_question(self, question_id: str) -> dict:
+        return self._request("DELETE", f"/questions/{question_id}")
+
     # ─── Categories ──────────────────────────────────────────────────────
 
     def get_category(self, category_id: str) -> dict: