hive-c0re copies the hive's store read token to /run/hyperhive/forge-hive-token
for nix's git credential helper, and no longer mints, reads or falls back to
the core admin token. drops the core user sweep, avatar upload, webhook
cleanup and hive-priv's RunForgeAdmin.
A rebuild's MetaSync resolves the head of the swarm's internal/meta once and
records it; the prebuild and the swap build that flake instead of the hive's
own, and a first deploy does the same in Create. hive-priv takes the commit as
a validated meta_rev on UpdateContainer and CreateContainer and builds from its
own forge URL (HIVE_PRIV_FORGE_URL).
The head is used only when its flake lists the agent at the config commit the
forge's main is at; otherwise, and when the repo has no commit or this hive has
no core token file for nix's git, the hive renders locally as before.
hive-c0re's and hive-priv's gitconfig now share the forge credential helper and
rewrite the forge's https URLs to http, which hive-priv lacked.
