General-purpose mirror mechanism for the internal forge, per mara's call on
#2074 (real Forgejo pull-mirrors, nix-configured — not a pushed clone).
- services.hyperhive.forge.mirrors: list of { upstream, dest } pull-mirrors,
any repo. Each is created as a real Forgejo pull-mirror (re-syncs from
upstream), dest = <owner>/<repo> in its own org.
- When forge.ci.enable is set: an actions/checkout mirror is auto-appended +
forgejo DEFAULT_ACTIONS_URL is pointed at this instance, so CI
'uses: actions/checkout@vN' resolves on loopback — immune to a host-resolver
blip that previously reded every checkout (the seed/re-sync needs external
DNS, but that's off the CI critical path).
- forgejo-seed-mirrors.service: host-side oneshot (the core admin token never
enters a container), modelled on hive-ci-prefetch — waits <=60s for the core
token, then idempotently ensures each dest org + creates the pull-mirror via
the migrate API. partOf the forge container so it re-ensures on restart.
- assertions: dest must be <owner>/<repo>; mirror orgs can't shadow the
c0re-managed namespaces (config/shared/agents/core) so the seed never races
hive-c0re's own provisioning.
Supersedes #2074 (the raw-clone stopgap) as the durable #2072 fix.
4a3581a3d2