v1.2.0

Stories implemented since v1.1.0:

• deliver-reaches-bg-session: a delivery to a background session counts as delivered only after a look that shows the text read; a delivery nobody read has the new outcome unread.
• box-crash-loop-reads-failed: a boxed runtime that ends within 10 s of its start is a failed start with the error text of runtime.log; the instance reads Unreachable; restarts back off to 5 minutes; conductor doctor dry-runs the box of a placement: systemd instance.
• checkout-name-differs-from-project: a GitLab checkout is one repository under its directory name; one project in two sources is recorded once; exclude matches the directory name or the project path.
• gc-idle-targets: conductor gc lists and removes cargo targets no build holds, under cargo's lock.
• getting-started-substrate-steps-portable: the substrate steps of the getting-started page and SETUP.md work on distributions whose CA bundle is a link.

Known limit: on substrate-daemon 0.20.0 a runtime at placement: systemd does not serve its API, because substrate denies the Unix socket it binds in a box. The box, its four writable roots and the failed-start record hold; placement: none is not affected.