[orian]

Summary

• report materialized-view order-only changes as column_order with explicit old and new lists
• preserve the existing unsafe recreate policy; no column-reordering behavior is introduced
• add plan -ignore-column-order with the same semantics as diff
• show the opt-out hint only in interactive text output, keeping redirected and JSON output clean
• document the policy and structured field vocabulary

Tests

• end-to-end diff coverage for text, JSON, and ignored order
• end-to-end plan -dump coverage for default and ignored table/materialized-view order
• unit coverage for plan option propagation, comparison rendering, unsafe reasons, and terminal-only hints
• go test ./...
• go test -race ./internal/... ./cmd/...
• go vet ./...
• go build ./...

Addresses #240 point 1 only. Point 2 remains intentionally unimplemented.
Closes #241.