refactor: rename thumbnail_rendering queue to asset_pipeline

The queue handles far more than thumbnails: OCC tessellation, USD master
generation, GLB production, order line renders, and workflow renders.
asset_pipeline better reflects its role as the render-worker's primary queue.

Updated all references in: task decorators, celery_app.py, beat_tasks.py,
docker-compose.yml worker command, worker.py MONITORED_QUEUES, admin.py,
CLAUDE.md, LEARNINGS.md, Dockerfile, helpTexts.ts, test files,
and all .claude/commands/*.md skill files.

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

backend/app/services/render_blender.py

@@ -15,8 +15,8 @@ from pathlib import Path
 logger = logging.getLogger(__name__)
 
 
-def _glb_from_step(step_path: Path, glb_path: Path) -> None:
-    """Convert STEP → GLB via OCC (export_step_to_gltf.py, no Blender needed)."""
+def _glb_from_step(step_path: Path, glb_path: Path, tessellation_engine: str = "occ") -> None:
+    """Convert STEP → GLB via OCC or GMSH (export_step_to_gltf.py, no Blender needed)."""
     import subprocess
     import sys as _sys
 
@@ -32,12 +32,13 @@ def _glb_from_step(step_path: Path, glb_path: Path) -> None:
         "--output_path", str(glb_path),
         "--linear_deflection", str(linear_deflection),
         "--angular_deflection", str(angular_deflection),
+        "--tessellation_engine", tessellation_engine,
     ]
     result = subprocess.run(cmd, capture_output=True, text=True, timeout=120)
     for line in result.stdout.splitlines():
-        logger.info("[occ-gltf] %s", line)
+        logger.info("[export-gltf] %s", line)
     for line in result.stderr.splitlines():
-        logger.warning("[occ-gltf stderr] %s", line)
+        logger.warning("[export-gltf stderr] %s", line)
     if result.returncode != 0 or not glb_path.exists() or glb_path.stat().st_size == 0:
         raise RuntimeError(
             f"export_step_to_gltf.py failed (exit {result.returncode}).\n"
@@ -90,8 +91,9 @@ def render_still(
     mesh_attributes: dict | None = None,
     log_callback: "Callable[[str], None] | None" = None,
     usd_path: "Path | None" = None,
+    tessellation_engine: str = "occ",
 ) -> dict:
-    """Convert STEP → GLB (OCC) → PNG (Blender subprocess).
+    """Convert STEP → GLB (OCC or GMSH) → PNG (Blender subprocess).
 
     When usd_path is provided and the file exists, the GLB conversion step is
     skipped and Blender imports the USD stage directly (--usd-path flag).
@@ -125,7 +127,7 @@ def render_still(
         glb_size_bytes = 0
     else:
         if not glb_path.exists() or glb_path.stat().st_size == 0:
-            _glb_from_step(step_path, glb_path)
+            _glb_from_step(step_path, glb_path, tessellation_engine)
         else:
             logger.info("GLB local hit: %s (%d KB)", glb_path.name, glb_path.stat().st_size // 1024)
         glb_size_bytes = glb_path.stat().st_size if glb_path.exists() else 0
@@ -310,6 +312,7 @@ def render_turntable_to_file(
     rotation_y: float = 0.0,
     rotation_z: float = 0.0,
     usd_path: "Path | None" = None,
+    tessellation_engine: str = "occ",
 ) -> dict:
     """Render a turntable animation: STEP → STL → N frames (Blender) → mp4 (ffmpeg).
 
@@ -349,7 +352,7 @@ def render_turntable_to_file(
         logger.info("[render_blender] turntable using USD path: %s", usd_path)
     else:
         if not glb_path.exists() or glb_path.stat().st_size == 0:
-            _glb_from_step(step_path, glb_path)
+            _glb_from_step(step_path, glb_path, tessellation_engine)
         else:
             logger.info("GLB local hit: %s (%d KB)", glb_path.name, glb_path.stat().st_size // 1024)
     glb_duration_s = round(time.monotonic() - t_glb, 2)