cdc-audit

Audit and resolve clock-domain-crossing (CDC) risks on a design: enumerate every clock crossing, classify each by structure (synchronizer present/absent, single-bit vs bus, async reset, reconvergence), and apply the smallest safe fix (synchronizer RTL, set_clock_groups / set_max_delay -datapath_only / set_bus_skew constraints) without ever waiving a real crossing. Invoke when the user says "cdc analysis", "check…