Fix Layer 0 QualityAttribute nodes in seed.py

Removed value_type property from Layer 0 QualityAttribute nodes. These
are STANDARD quality dimensions (not observed values), so they should
not have value_type or value_number properties.

Threshold values are stored on the REQUIRES relationship edges, not on
the QualityAttribute nodes themselves.

Change:
- Removed 'ON CREATE SET qa.value_type = "number"' from QA node creation

Re-seeded quarry database with corrected Layer 0 data.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: brockwebb

scripts/quarry/seed.py

@@ -294,8 +294,7 @@ def seed_layer_0(driver, dry_run=False):
         qa_nodes[(qa_name, qa_dimension)] = True
 
     for (qa_name, qa_dimension) in qa_nodes.keys():
-        stmt = f"""MERGE (qa:QualityAttribute {{name: "{qa_name}", dimension: "{qa_dimension}"}})
-ON CREATE SET qa.value_type = "number" """
+        stmt = f'MERGE (qa:QualityAttribute {{name: "{qa_name}", dimension: "{qa_dimension}"}})'
         statements.append(stmt)
 
     # === REQUIRES EDGES ===