[akshathayadav378-boop]

What

strata generate --help never listed the VRAM reserve flags, even though the parser accepts them:

• --vram-reserve-mib N is parsed at src/program/generate.cpp:3213, default 700.
• --vram-reserve-later-mib N is parsed on the next line.

The usage block lists --peer-reserve-mib but neither of these, which is why a from-source Windows build reported that the documented flag "is absent from the binary": it is accepted, just not advertised.

This adds both lines to the usage text, next to the peer reserve line, with the defaults the code uses.

Verification

• --vram-reserve-mib default 700 and --vram-reserve-later-mib parser entries read from src/program/generate.cpp (option struct around line 785, parser at 3213-3215).
• String-only change in the usage text; no behaviour changes.
• I could not build edge0-strata here (no CUDA toolchain on this machine), so --help output was not run locally. A strata generate --help check on a CUDA machine is enough.

Refs #209