refactor(P11+P12): codebase hygiene — CLAUDE.md rewrite, type safety, dead code removal

- Rewrite CLAUDE.md to match current 8-service architecture (was 11, 5 deleted)
- Remove all as-any casts in OrderDetail.tsx (9 casts → 0)
- Add cad_parsed_objects/cad_part_materials to OrderItem interface
- Rename require_admin → require_global_admin across 6 router files (22 calls)
- Remove EXPORT_GLB_PRODUCTION enum + generate_gltf_production_task (dead code)
- Remove worker-thumbnail from ALLOWED_SERVICES, replace Flamenco link
- Delete obsolete PLAN.md (1455 lines) and PLAN_REFACTOR.md (1174 lines)
- Fix digit-only USD prim names with p_ prefix

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/app/domains/rendering/workflow_router.py

@@ -20,7 +20,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.database import get_db
 from app.domains.auth.models import User
-from app.utils.auth import get_current_user, require_admin, require_admin_or_pm, require_pm_or_above
+from app.utils.auth import get_current_user, require_global_admin, require_admin_or_pm, require_pm_or_above
 from app.domains.rendering.models import WorkflowDefinition, WorkflowRun
 from app.domains.rendering.schemas import (
     WorkflowDefinitionCreate,
@@ -52,7 +52,6 @@ _STEP_CATEGORIES: dict[StepName, StepCategory] = {
     StepName.BLENDER_TURNTABLE: "rendering",
     StepName.OUTPUT_SAVE: "output",
     StepName.EXPORT_GLB_GEOMETRY: "output",
-    StepName.EXPORT_GLB_PRODUCTION: "output",
     StepName.EXPORT_BLEND: "output",
     StepName.STL_CACHE_GENERATE: "processing",
     StepName.NOTIFY: "output",
@@ -74,7 +73,6 @@ _STEP_DESCRIPTIONS: dict[StepName, str] = {
     StepName.BLENDER_TURNTABLE: "Render all turntable animation frames via Blender HTTP micro-service",
     StepName.OUTPUT_SAVE: "Upload the rendered output file to storage and create a MediaAsset record",
     StepName.EXPORT_GLB_GEOMETRY: "Export a geometry-only GLB for the 3-D viewer (no materials)",
-    StepName.EXPORT_GLB_PRODUCTION: "Export a production GLB with full materials from the .blend template",
     StepName.EXPORT_BLEND: "Save the production .blend file as a downloadable MediaAsset",
     StepName.STL_CACHE_GENERATE: "Convert STEP → STL (low + high quality) and cache next to the STEP file",
     StepName.NOTIFY: "Emit a user notification via the audit-log notification channel",
@@ -140,7 +138,7 @@ async def get_workflow(
 @router.post("", response_model=WorkflowDefinitionOut, status_code=201)
 async def create_workflow(
     body: WorkflowDefinitionCreate,
-    _user: User = Depends(require_admin),
+    _user: User = Depends(require_global_admin),
     db: AsyncSession = Depends(get_db),
 ):
     if body.config:
@@ -164,7 +162,7 @@ async def create_workflow(
 async def update_workflow(
     workflow_id: uuid.UUID,
     body: WorkflowDefinitionUpdate,
-    _user: User = Depends(require_admin),
+    _user: User = Depends(require_global_admin),
     db: AsyncSession = Depends(get_db),
 ):
     result = await db.execute(
@@ -193,7 +191,7 @@ async def update_workflow(
 @router.delete("/{workflow_id}", status_code=204)
 async def delete_workflow(
     workflow_id: uuid.UUID,
-    _user: User = Depends(require_admin),
+    _user: User = Depends(require_global_admin),
     db: AsyncSession = Depends(get_db),
 ):
     result = await db.execute(