Forward-port PR #399 to main: Bump TBS size to 1850, consolidate circuits, clean up passport-input-gen

[Bisht13]

PR #399 was merged into the v1 branch but has not been ported to main.

• v1 PR: Bump TBS size to 1850, consolidate circuits, and clean up passport-input-gen #399
• Title: Bump TBS size to 1850, consolidate circuits, and clean up passport-input-gen
• Author: @rose2221
• Merged into v1: 2026-04-08

Action

Open a PR against main that brings these changes over. Resolve any conflicts that arise from divergence between v1 and main.

If any portion of the change is no longer applicable on main (e.g. circuits have been reorganized differently), please call that out in the porting PR description.