fix(v1.0.1): VDE-014/015/016 — STL API cleanup + ssi_boolean fixes

VDE-014 (High): Remove duplicate void write_stl/write_stl_ascii declarations
VDE-015 (Medium): Fix Vector3F→Vector3f, Point3F→Point3f case sensitivity
VDE-016 (High): Add forward declarations for face_bounds/face_normal/SSICurveData
  in ssi_boolean.cpp — fixes two-phase name lookup in GCC

docs/feedback/VDE-014.md

@@ -1,6 +1,6 @@
 ---
 id: VDE-014
-status: open
+status: fixed
 severity: high
 category: bug
 date: 2026-07-27

docs/feedback/VDE-015.md

@@ -1,6 +1,6 @@
 ---
 id: VDE-015
-status: open
+status: fixed
 severity: medium
 category: bug
 date: 2026-07-27

docs/feedback/VDE-016.md

@@ -1,6 +1,6 @@
 ---
 id: VDE-016
-status: open
+status: fixed
 severity: high
 category: bug
 date: 2026-07-27