[jamescrosswell]

The contract #355 (S8, what the bionics do) builds on.

• InteractableKind.JACK ("jack"): a machine only the datajack works, such as the metro's dead terminal and its maintenance lift. The maker space's machines stay machine. A link ending on a jack's stand tile is taken only with the datajack.
• No new message. E at a jack sends pick_up, which already reaches clues (S13): with the datajack, it finds the clue the jack holds. docs/protocol.md now says pick_up reaches clues, and that player_collapsed leaves the lamp off (S4).
• The jump is the player's own, higher with the hydraulic legs. The client reads the legs from player_state's body, so it needs no new field.
• flushed hook. The protocol forwarder sets a line's flushed from app.state.flushed(line), as it does voiced, so S8 can set it from simile.conversation without touching the protocol.

Additive. simile schema --check and the protocol export are regenerated and pass.

Closes #385

🤖 Generated with Claude Code

[jamescrosswell]

Reviewed: approved.

Scope is only schema, protocol, the generated files, docs/protocol.md and their tests. The change is additive. flushed already existed on LineMessage and is still left out when false, so fixture dumps don't change. The only schema change is a new enum value, so old saves load. simile schema --check passes, and so do the protocol and schema tests (run on #387's branch, which contains this one). JACK, E sending pick_up, the app.state.flushed hook (same shape as voiced, with a test) and the protocol.md notes all match #385.

Optional nits:

• The jack wording says a link "ending on" a stand tile. S8: What the bionics do #387 locks the link leaving from the lift's stand tile, and the way back up from the sewers is open. "leaving from" would match it.
• In docs/protocol.md, the player_collapsed paragraph's edited line is about 130 characters and wasn't rewrapped.
• Three docstrings are now three lines long: InteractableKind, PickUpMessage and PlayerCollapsedMessage. They're exported schema descriptions, so I left them.