link unit: pin v2.8.8 (mount-boundary routing + opendir synthesis, tebako#615) — 0.16.25

[ronaldtse]

What

Pins the embedded link unit to tebako v2.8.8 and cuts runtime line 0.16.25.

Why (tebako#615)

Mount-boundary synthesis now reaches the route gate on every platform path: path_is_embedded claims boundary ancestors, so a mount at /flavors.d/<name> with nothing mounted at / routes stat/opendir for the intermediates into the engine instead of falling through to the host — on macOS a readdir across the synthesized boundary answered ENOENT and extension-slice gems never resolved (cannot load such file at dispatch); opendir grew the no-owner synthesis arm stat had since #600.

Contract unchanged (2). Full-catalog re-cut: the runtime exe embeds the unit.

Proof chain

• tebako v2.8.8 release: 153 assets, run green.
• Downstream consumer proof (post-publish): a flavor slice mounted at /flavors.d/<name> resolves its gems through a 0.16.25 runtime on macOS.