Advance deduplicated collection creation coverage

docs/status/WBV2-P20-003.md

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+# WBV2-P20-003 status
+
+- task: `WBV2-P20-003`; parent: `WBV2-P20-002`; status: `done`
+- new feature claim: `OBJECT_OPERATIONS.COLLECTION_CREATE`; exact binding: `operator:object.collection_add`
+- base inventory: `6900` total, `281` completed, `6618` pending
+- cumulative overlay: `287` effective completed, `6612` effective pending, claimed complete overlay: `6`
+- repeated Blender/Chromium validation: `0`; unique behavior batches: Paint, Duplicate, Create, Parent, Collection
+- provenance epoch: `2`; release: `AUTHORIZED_REBASELINE_ONLY`; fullHistoricalReproduction: `false`
+- nextTask: `NONE`