201/201 LDBC battery on Databricks SF10 — ZERO FAILS Complete LDBC SNB battery pass on managed edges (143.9M edges, 27.2M nodes). Every query in the C-series generates correct SQL and executes successfully. Session arc: 107 -> 201 over two working days. Key deliverables: - Single SQL path (tree serializer, 148 lines) - ~9600 lines legacy code deleted - Iterative UNION ALL for bounded VL paths - Managed-edge views with source-table property LEFT JOIN - SQLRuntimeError vs SQLGenerationError distinction - Optimizer fusion fix for VL MATCH groups - Pre-VL CTE alias rewrite for all variables - sql_fallback warning for observable performance cliffs