fix(HRT-72): fix Overpass OSM scraper — bounding box + Content-Type + User-Agent

Bug 1: Replace area["name"="..."] query with direct bounding box (50.4,2.8,50.8,3.3)
  — area resolution fails silently on public Overpass API depending on server version.
  — Direct bbox is deterministic and reliable for MEL coverage.
  — Also simplify website filter to use [!"website"] tag negation syntax.

Bug 2: Add explicit Content-Type: application/x-www-form-urlencoded header
  — Some network configs/proxies strip the implicit header set by requests.post(data={}).
  — Explicit header is best practice per Overpass API docs.

Bug 3 (discovered during test): Add User-Agent header
  — overpass-api.de returns 406 Not Acceptable for User-Agent: python-requests/*.
  — Fix: send H3R7Tech-LeadHunter/1.0 as custom User-Agent.
  — Tested: 5 OSM leads returned from Lille center bounding box.

Backup: leadhunter_scraper.py.backup_20260427_221429

Co-Authored-By: Paperclip <noreply@paperclip.ing>

leadhunter_scraper.py

@@ -62,13 +62,13 @@ TARGET_TYPES = ["restaurant", "cafe", "bar", "bakery", "food"]
 # Overpass API endpoint
 OVERPASS_URL = "https://overpass-api.de/api/interpreter"
 
-# Requête Overpass MEL — boundary nommée "Métropole Européenne de Lille"
+# Requête Overpass MEL — bounding box directe (50.4,2.8,50.8,3.3) couvrant la MEL
+# Fix HRT-72 : la résolution area["name"=...] échoue silencieusement sur l'API Overpass publique
 OVERPASS_MEL_QUERY = """
 [out:json][timeout:60];
-area["name"="Métropole Européenne de Lille"]["boundary"="administrative"]->.mel;
 (
-  node["amenity"~"^(restaurant|cafe|bar|fast_food|bakery)$"]["website"!~".+"](area.mel);
-  way["amenity"~"^(restaurant|cafe|bar|fast_food|bakery)$"]["website"!~".+"](area.mel);
+  node["amenity"~"^(restaurant|cafe|bar|fast_food|bakery)$"][!"website"](50.4,2.8,50.8,3.3);
+  way["amenity"~"^(restaurant|cafe|bar|fast_food|bakery)$"][!"website"](50.4,2.8,50.8,3.3);
 );
 out center 200;
 """
@@ -279,6 +279,10 @@ class OverpassScraper:
             resp = requests.post(
                 OVERPASS_URL,
                 data={"data": OVERPASS_MEL_QUERY},
+                headers={
+                    "Content-Type": "application/x-www-form-urlencoded",  # Fix HRT-72 Bug2
+                    "User-Agent": "H3R7Tech-LeadHunter/1.0 (contact@h3r7tech.fr)",  # Fix HRT-72 Bug3: overpass-api.de blocks python-requests UA
+                },
                 timeout=90,
             )
             resp.raise_for_status()