Fix ty-ios type-check errors (ifcopenshell-python side)

poe ty's sequence only reaches ty-ios once ty-bonsai passes, so these
never surfaced until now:

- util/alignment.py: drop the stale `include_referent=False` kwarg from
  add_zero_length_segment() - that parameter was removed from the function's
  signature in 45ea5eb07 but this caller in a different file was missed,
  leaving a latent TypeError if this code path is ever exercised.
- ifcopenshell_wrapper.pyi: add the optional trailing `logger` parameter to
  parse_ifcxml/open/construct_iterator*, matching the real SWIG signatures
  in src/ifcwrap/*.i (all declare `Logger& logger = Logger::Root()`) that
  the hand-maintained stub never picked up.
- ifcopenshell/__init__.py: remove a stale `ty: ignore[unknown-argument]`
  comment that ty confirms is no longer suppressing anything.
- assign_cost_item_quantity.py: OPERATORS mixes 2-arg binary operators with
  the 1-arg `operator.neg` (for ast.USub), but FormulaEvaluator has no
  visit_UnaryOp so USub can never reach this lookup via visit_BinOp.
  Suppressed at the call site rather than touching the dict, since this
  looks like scaffolding for unary-minus support rather than dead code.
- Explicit submodule imports (ifcopenshell.geom / api.alignment / util.unit
  / api.aggregate / api.context / api.spatial) added where accessed but
  only reachable by accident of import order.

src/ifcopenshell-python/ifcopenshell/api/alignment/_get_segment_endpoint.py

@@ -18,6 +18,7 @@
 
 
 import ifcopenshell.api.alignment
+import ifcopenshell.geom
 from ifcopenshell import entity_instance, ifcopenshell_wrapper
 from ifcopenshell.api.alignment._map_alignment_segment import _map_alignment_segment
 from typing import Union

src/ifcopenshell-python/ifcopenshell/api/alignment/update_end_point.py

@@ -19,6 +19,7 @@
 import numpy as np
 
 import ifcopenshell
+import ifcopenshell.api.alignment
 import ifcopenshell.util.placement
 from ifcopenshell import entity_instance
 

src/ifcopenshell-python/ifcopenshell/api/alignment/update_fallback_position.py

@@ -18,6 +18,7 @@
 
 import ifcopenshell
 import ifcopenshell.util.placement
+import ifcopenshell.util.unit
 from ifcopenshell import entity_instance
 
 

src/ifcopenshell-python/ifcopenshell/api/cost/assign_cost_item_quantity.py

@@ -287,7 +287,7 @@ class FormulaEvaluator(ast.NodeVisitor):
     def visit_BinOp(self, node):
         left = self.visit(node.left)
         right = self.visit(node.right)
-        return OPERATORS[type(node.op)](left, right)
+        return OPERATORS[type(node.op)](left, right)  # ty: ignore[too-many-positional-arguments]
 
     def visit_Name(self, node):
         return self.values[node.id]