ours: наш оверлей к апстриму 1.5.1 (дельта для переноса в 1.6.0)

10 изменённых файлов + 2 новых (engineering/gost_titleblock.py, _fonts/isocpeur.ttf).
Ветка-донор для трёхстороннего переноса в ours-1.6.

engineering/__init__.py

@@ -45,6 +45,10 @@ from .preflight import (
     preflight_drawing,
 )
 from .refiner import RefineResult, RefineRound, RepairAction, refine_drawing
+from .gost_titleblock import (
+    GostTitleBlockMetadata,
+    apply_gost_form3_titleblock,
+)
 from .titleblock import TitleBlockMetadata, apply_iso_a3_titleblock
 from .validator import DrawingValidator, ValidationFinding, ValidationResult
 
@@ -72,6 +76,8 @@ __all__ = [
     "ensure_standard_linetypes",
     "apply_iso_a3_titleblock",
     "TitleBlockMetadata",
+    "apply_gost_form3_titleblock",
+    "GostTitleBlockMetadata",
     "DrawingValidator",
     "ValidationResult",
     "ValidationFinding",