新增cdsl

backend/agent/skills/cad-engine/references/part-skills/PROVENANCE.md

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+# Part Skill Provenance
+
+The files under `source/` are copied from the local `cadSet` checkout:
+
+`/Users/lk/Projects/cadSet/text-to-cad/skills/cad/references/cad-skillx/`
+
+The source planning, functional, and atomic documents are MIT licensed by
+earthtojake. The files under `bridge/` are local CDSL-specific adaptations.
+They preserve the structural guidance while documenting the current CDSL
+schema/runtime boundary. Keep the source copies unchanged when possible and
+review future upstream updates manually.
+
+Each local `source/` path maps to the same relative path below the upstream
+root above. The copied source documents are:
+
+- `planning/mounting-plate.planning.md`
+- `planning/mounting-bracket.planning.md`
+- `planning/flange.planning.md`
+- `planning/simple-shaft-or-cylindrical-rod.planning.md`
+- `planning/bearing-housing-or-seat.planning.md`
+- `planning/hexagonal-nut.planning.md`
+- `functional/axisymmetric-revolve-strategy.functional.md`
+- `functional/bearing-bore-seat.functional.md`
+- `functional/flange-bolt-circle.functional.md`
+- `functional/mounting-plate-hole-layout.functional.md`
+- `functional/slotted-adjustment-feature.functional.md`
+- `functional/standard-hole-wizard.functional.md`
+- `functional/symmetric-feature-layout.functional.md`
+- `atomic/coaxial-bore-rule.atomic.md`
+- `atomic/counterbored-hole-creation.atomic.md`
+- `atomic/extrude-base-profile.atomic.md`
+- `atomic/fillet-chamfer-last.atomic.md`
+- `atomic/pattern-holes-from-datum.atomic.md`
+- `atomic/revolve-profile-around-axis.atomic.md`
+- `atomic/threaded-hole-creation.atomic.md`
+- `atomic/through-hole-cut.atomic.md`