Show off-sheet records in HERON schematic comparison

[ShiboSoftwareDev]

Summary

• pin altiumts PR Fix stacked switch pin geometry #90 by exact commit for schematic SVG viewBox support
• let real-board round-trip fixtures share explicit SVG render options
• render the HERON source and generated schematic in one common frame
• reveal the valid top-row records that the declared paper previously clipped

Validation

• bun run format:check
• bun run typecheck
• bun test tests/schematic-roundtrip02-heron-pay-ssm.test.ts
• visually inspected the refreshed source/round-trip snapshot

Dependency

Depends on tscircuit/altiumts#90. The exact dependency commit is pinned so CI exercises the proposed renderer API.