Intentional deviation from Ghostty 1.3.1 (DEVIANT_FIXES.md row 33).
Zig's os/systemd.zig:116 accepts a NOTIFY_SOCKET path of exactly 108
bytes and then writes the terminating NUL to path[108], one past the
end of sockaddr_un.sun_path (out-of-bounds write). The Rust port's
socket address construction (since f8c5ce0) accepts at most 108 bytes
without a NUL and rejects longer paths, so it never writes out of
bounds; this commit records that deviation and adds a regression test.
Test Plan:
- cargo test -p ghostty-os notify_maximum_length_socket_path_is_rejected_safely
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