fix(cadastre): NSPDBulkClient verify=False for NSPD SSL chain (#168 hotfix)

Pilot run #1 failed on all 50 quarters with:
  NspdBulkError: [SSL: CERTIFICATE_VERIFY_FAILED] self-signed certificate
  in certificate chain

NSPD prod chain on Beget VPS contains an internal/self-signed CA →
httpx default verify=True trips. Reuse pattern from legacy
app.services.scrapers.nspd_lite (uses ssl._create_unverified_context()
for same reason since April 2026).

Risk profile: NSPD public gov data, no sensitive payload outbound,
admin token не уходит к NSPD endpoints. MITM risk minimal.

backend/app/scrapers/nspd_bulk_client.py

@@ -114,10 +114,16 @@ class NSPDBulkClient:
         self._client: httpx.AsyncClient | None = None
 
     async def __aenter__(self) -> NSPDBulkClient:
+        # NSPD prod chain contains a self-signed/internal CA on Beget VPS →
+        # default verify trips CERTIFICATE_VERIFY_FAILED. Existing legacy
+        # client (app.services.scrapers.nspd_lite) uses unverified context
+        # for the same reason — reuse pattern. Risk OK: public gov data,
+        # no sensitive payload, X-Admin-Token не уходит к NSPD.
         self._client = httpx.AsyncClient(
             headers=self._headers,
             timeout=self._timeout,
             follow_redirects=True,
+            verify=False,
         )
         return self