fix(gamedata): encoder bucket entries dropped by ParseAddresses guard

base-only entries (base + factory, no signature/refs) are silently skipped
by ParseAddresses (gamedata.cpp:840 requires signature OR refs), so the five
EncoderBucket entries never registered -> KeyNotFound at resolve -> bucket
classification fell back to int-only. Resolve each bucket standalone from the
registry table-load lea with a full factory chain (+3 r +N*16 d) so they carry
a signature and survive the guard. Pure declarative offset resolution.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>