Mechanical relocation out of think/importers/shared.py into a new think/entities/seeding.py module. No behavior change — function body is byte-for-byte identical. - Five importer modules now import seed_entities from think.entities.seeding: kindle, documents, granola, ics, obsidian. - Three function-scoped test imports in tests/test_importer_granola.py updated to the new path. - Mock/patch targets in test_importer_obsidian_sync.py and test_importer_documents.py intentionally unchanged: they patch the caller's namespace, which is still valid after the move. - Removed the "think/importers/shared.py": "V2" allowlist entry in scripts/check_layer_hygiene.py (the file no longer contains a domain-write function). Kept the generic allowlist framing. Restores the L2 invariant that only think/entities/saving.py and apps/entities/call.py own entity-write code paths by making the write-through-a-domain-call visible at every importer callsite. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>