Replace .ToArray() with collection spread, simplify single-statement await using blocks, use Lock for Postgres schema gates, and document IDE0063/IDE0305/IDE0330/CA1859 conventions in csharp-style.md.
Split IResourceNodeInstanceStore + ResourceNodeInstanceOperations with lazy init from catalog maxGathers, atomic decrement, node_depleted and unknown_node reason codes, V006 Postgres migration, and parity tests.