Move the paged-attention patch series (0001-0004 + docs) into patches/paged/,
applied behind a new LLAMA_PAGED build flag (default on). The base patches/ dir is
now clean, so a dep-bump that breaks a paged hook can be unblocked with
LLAMA_PAGED=off (clean-against-upstream build) and the paged carry fixed
independently - decoupling the paged-KV maintenance from routine bumps without a
separate backend. Both apply paths wired (Makefile git-apply + prepare.sh re-apply,
flag passed through). Runtime stays gated by LLAMA_KV_PAGED env, so an on build is
byte-identical to stock until that env is set. Glob/flag logic verified in bash.
Assisted-by: Claude:opus-4.8 [Claude Code]
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
