Sessions can now register as spare and poll to claim one, pointing at sessions started before you need them.
Registration tracks and reports spare sessions and polls to claim them, but nothing in the build makes spare sessions reachable by default.
What's wrong with this entry?
Session registration now tracks whether a session was created spare and polls to claim one, and reports itself as spare when registering. This points at sessions started ahead of time and handed out when needed. Nothing in this build shows spare-session creation being reachable by default, so whether any are made is decided elsewhere.
- The related lock that keeps one session's work from another now records whether it is bound to this specific machine.
- A dedicated error type was added for two resume attempts racing each other.
boundToThisMachine
Strings lifted out of the shipped bundle, so the claim above can be checked against them.