feat: 升级算法包 delivery_v1.1 → v1.2，新增任务级 CAD 与测距面板

- 算法包替换为 delivery_v1.2（coupler_panel 新增 autotune/layer_select，underframe_deflection 新增 single_beam 管线），删除 delivery_v1.1
- manifests/adapters 的 PYTHONPATH 与版本说明同步更新到 v1.2
- 新增任务级 CAD 文件支持（task_cad_files 表、上传/读取路由、TaskManager 全选与加载显示）
- 新增 train-measurement 自定义前端面板（YAML 编辑器 + 可视化 ROI 配置 + 3D 取点）
- PointCloudViewer 支持 PLY 叠加层渲染与 ROI 拾取
- Dockerfile 改用 Miniforge 安装 pythonocc-core，修复 libgomp/libstdc++ 依赖

alg/delivery_v1.2/underframe_deflection/__init__.py

@@ -0,0 +1,67 @@
+"""Point-cloud-only underframe beam deflection measurement.
+
+Public API (stable across patch releases — see USAGE.md):
+
+- :func:`compute_deflection` — pure, in-memory computation; returns a
+  :class:`DeflectionResult`.
+- :func:`load_point_cloud` — read a PLY/XYZ/CSV file into a numpy array.
+- :class:`DeflectionResult`, :class:`SideDeflection`, :class:`DeflectionCurves`
+  — the result schema.
+- :mod:`underframe_deflection.artifacts` — optional file writers
+  (JSON / CSV / PNG plots / coloured PLY overlays).
+- :mod:`underframe_deflection.exceptions` — exception hierarchy.
+- :func:`run_measurement_pipeline` — convenience wrapper that does
+  read + compute + write-all in one call.
+"""
+
+from ._version import ALGORITHM_VERSION, SCHEMA_VERSION, __version__
+from .api import (
+    DeflectionCurves,
+    DeflectionResult,
+    ProgressCallback,
+    SideDeflection,
+    compute_deflection,
+    load_point_cloud,
+)
+from .cad_io import read_cad_reference
+from .exceptions import (
+    DeflectionError,
+    FrameInferenceError,
+    InsufficientPointsError,
+    InvalidPointCloudError,
+    UnsupportedFormatError,
+)
+from .pipeline import run_measurement_pipeline
+from .preprocess import bilateral_filter_points
+from .registration import RegistrationResult, register_to_cad
+from .roi import apply_passthrough, load_roi_aabb
+from .single_beam import SingleBeamResult, measure_single_beam
+from .single_beam_pipeline import run_both_beams, run_single_beam_pipeline
+
+__all__ = [
+    "__version__",
+    "ALGORITHM_VERSION",
+    "SCHEMA_VERSION",
+    "compute_deflection",
+    "load_point_cloud",
+    "DeflectionResult",
+    "SideDeflection",
+    "DeflectionCurves",
+    "ProgressCallback",
+    "run_measurement_pipeline",
+    "DeflectionError",
+    "InvalidPointCloudError",
+    "InsufficientPointsError",
+    "FrameInferenceError",
+    "UnsupportedFormatError",
+    "read_cad_reference",
+    "load_roi_aabb",
+    "apply_passthrough",
+    "bilateral_filter_points",
+    "register_to_cad",
+    "RegistrationResult",
+    "measure_single_beam",
+    "SingleBeamResult",
+    "run_single_beam_pipeline",
+    "run_both_beams",
+]