Merge the three pt/elfldr clones (bootstrapper, libNineS, unpacker) into a
single liborion_elfldr with one authid policy (elevate once at inject entry,
never per ptrace). Wire consumers through shared headers; drop dead unpacker
loader sources. Route shellui if_exists through orion/platform and daemon
ShellUI/BigApp pid lookup through orion_proc. Document the layout and audit
status in docs/arch.md and docs/architecture-audit.md.