* build(orcad): build server glibc slots on glibc 2.28 and add the glibc 2.17 compat slot
Design D6: the default linux-{x64,arm64}-glibc node-pty slots now build in
manylinux_2_28 (digest-pinned) and are gated at glibc 2.28 / GLIBCXX_3.4.25
through a floor profile on verify-linux-glibc-floor.cjs; the desktop keeps
its Ubuntu 20.04 (2.31) default.
Adds the opt-in linux-x64-glibc217 compat target: NODE_RUNTIME_COMPAT_ASSETS
pins the unofficial glibc-217 Node (update/check pin scripts cover it, outside
SERVER_TARGETS), and a new CI lane builds the compat slot in manylinux2014
with static libstdc++, gates it at glibc 2.17 with no shared C++ runtime in
DT_NEEDED, and smokes it under the glibc-217 Node.
* refactor(node-runtime-pin): route compat lookups through isCompatServerTarget; keep the glibc doc's slot-name paragraph intact
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Co-authored-by: m4air <m4air@m4airs-Air.localdomain>