Removing objective_thread_pitch from scopes_info

app/services/scope_import.py

@@ -15,7 +15,6 @@ sub_part_type                       → SubPartType (get-or-create under "Scope"
 product_number                      → AugmentedPart.sku  (also the upsert / fit-lookup key)
 magnification_min / _max            → ScopeInfo
 objective_lens_diameter_mm          → ScopeInfo (descriptive only, no attachment point)
-objective_thread_pitch              → ScopeInfo
 ocular_outer_diameter_mm            → StaticConnection + AttachmentPoint "Ocular"
 objective_thread                    → ISO/UNC thread + AttachmentPoint "Objective"
 ocular_fit                          → Fit: scope's Ocular AP ↔ referenced part's first AP
@@ -75,7 +74,6 @@ EXPECTED_COLUMNS = [
     "url",
     "ocular_outer_diameter_mm",
     "ocular_fit",
-    "objective_thread_pitch",
     "objective_thread",
     "objective_fit",
 ]
@@ -321,7 +319,6 @@ async def import_scopes(db: AsyncSession, rows: list[dict]) -> ScopeImportResult
                 magnification_max=_num(row.get("magnification_max")),
                 model_suffix=model_suffix,
                 objective_lens_diameter_mm=_num(row.get("objective_lens_diameter_mm")),
-                objective_thread_pitch=_text(row.get("objective_thread_pitch")),
             )
 
             # Rebuild attachment points from scratch so re-imports stay idempotent