Adds two boolean/numeric feature flags on each 14th-gen plan:
- cpu_premium: chassis supports the Platinum 8280 CPU upgrade
(R440/R540 false; R640/R740/R740xd true)
- max_ram_gb: maximum RAM the chassis can physically host
(16-DIMM chassis cap at 1 TB; 24-DIMM at 1.5 TB)
These drive the route-level config-option filters in
routes/marketing.php so customers never see Platinum CPU on R440 or
the 1.5 TB RAM tier on a 16-slot chassis.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>