feat(cadfs): 补齐核心建模能力并建立代表性回归

- 新增 loft、双向切除、through-all/up-to-next 等 CADFS lowering 与 engine 支持
- 支持多种 reference plane、B-spline profile 和 circular pattern replay
- 保留 transform 历史，并烘焙安全的单源平移/旋转变换
- 改进 selector 绑定、拓扑快照和 pattern 变换处理
- 建立 17 个代表样本的转换、重建与比较回归工具链
- 补充 schema、author guidance、运行时和几何回归测试

backend/agent/skills/cdsl-author-guidance/manifest.json

@@ -15,12 +15,15 @@
     {"id": "10-repair-and-best-effort", "file": "10-repair-and-best-effort.md", "title": "10 Repair And Best Effort", "priority": 80, "mandatory": false},
     {"id": "op-extrude-add", "file": "op-extrude-add.md", "title": "Operation Appendix Extrude Add", "priority": 100, "mandatory": true},
     {"id": "op-extrude-cut", "file": "op-extrude-cut.md", "title": "Operation Appendix Extrude Cut", "priority": 100, "mandatory": true},
+    {"id": "op-loft", "file": "op-loft.md", "title": "Operation Appendix Loft", "priority": 100, "mandatory": true},
     {"id": "op-revolve", "file": "op-revolve.md", "title": "Operation Appendix Revolve", "priority": 100, "mandatory": true},
     {"id": "op-hole", "file": "op-hole.md", "title": "Operation Appendix Hole", "priority": 100, "mandatory": true},
     {"id": "op-reference", "file": "op-reference.md", "title": "Operation Appendix Reference", "priority": 100, "mandatory": true},
     {"id": "op-pattern", "file": "op-pattern.md", "title": "Operation Appendix Pattern", "priority": 100, "mandatory": true},
     {"id": "op-finish", "file": "op-finish.md", "title": "Operation Appendix Finish", "priority": 100, "mandatory": true},
-    {"id": "op-sphere", "file": "op-sphere.md", "title": "Operation Appendix Sphere", "priority": 100, "mandatory": true}
+    {"id": "op-sphere", "file": "op-sphere.md", "title": "Operation Appendix Sphere", "priority": 100, "mandatory": true},
+    {"id": "op-primitives", "file": "op-primitives.md", "title": "Operation Appendix Primitives", "priority": 100, "mandatory": true},
+    {"id": "op-thread", "file": "op-thread.md", "title": "Operation Appendix Thread", "priority": 100, "mandatory": true}
   ],
   "phase_sections": {
     "DEFAULT": ["00-author-contract", "03-coordinate-system-and-datums", "09-evidence-visual-review-and-validation"],
@@ -39,6 +42,9 @@
     "extrude_add_blind": ["op-extrude-add"],
     "extrude_add_two_sided": ["op-extrude-add"],
     "extrude_cut_blind": ["op-extrude-cut"],
+    "extrude_cut_two_sided": ["op-extrude-cut"],
+    "extrude_cut_through": ["op-extrude-cut"],
+    "loft_add": ["op-loft"],
     "revolve_add": ["op-revolve"],
     "revolve_cut": ["op-revolve"],
     "hole_blind": ["op-hole"],
@@ -49,8 +55,13 @@
     "reference_axis": ["op-reference"],
     "pattern_linear": ["op-pattern"],
     "pattern_mirror": ["op-pattern"],
+    "pattern_circular": ["op-pattern"],
     "fillet": ["op-finish"],
     "chamfer": ["op-finish"],
-    "sphere_add": ["op-sphere"]
+    "sphere_add": ["op-sphere"],
+    "box_add": ["op-primitives"],
+    "cylinder_add": ["op-primitives"],
+    "thread_add": ["op-thread"],
+    "thread_cut": ["op-thread"]
   }
 }