The old bakery-signing-key.minisign-sec on hestia was password-encrypted
and the password was lost, so scripts/gen-index.sh never actually signed
index.json (silent no-op warning). bakery/src/manifest.rs (0.3.0+) hard-
requires that signature, so every bakery command has been failing with
'fetching index.json.minisig — the index must be signed before it can be
trusted' since the signing enforcement shipped.
Generated a new no-password minisign keypair on hestia
(~/.secrets/bakery-signing-key-2.minisign-sec), updated the hardcoded
PUBKEY in manifest.rs and get.sh to match, wired
BAKERY_MINISIGN_SEC_KEY_PATH as a Forgejo Actions secret so future CI
releases sign automatically, and manually signed+published the current
index.json on hestia so bakery works immediately.