## Why
`codex migrate-nfs-db` reported a successful migration when the database directory existed but contained no databases.
## What changed
Count databases that were migrated or already use DELETE journal mode. If none are found, print `No databases found.` instead of the migration success message.
## Testing
Extend the CLI integration test to cover an empty directory, a failure on a corrupt logs database after an earlier conversion, and a successful rerun that recognizes the converted database as already in DELETE mode.
GitOrigin-RevId: 16b109645925164f3af5d35a909417872cfa004f
## Why
NFS database migration rejected files with group or other access. Allow accessible databases to migrate while making the effects on file access explicit.
## What changed
- Preserve file mode bits during migration while requiring owner read and write permissions on replacement files.
- Before CLI consent, disclose that replacements belong to the current user and do not copy the original owner, group, or extended ACLs. Require explicit confirmation for files with permissions other than `0600`.
- Warn at Linux TUI startup when NFS databases need migration and permission confirmation. Inspect journal mode without accessing WAL shared memory or releasing another connection's locks.
- Allow five seconds to acquire the exclusive database lock during migration.
## Testing
Add CLI coverage for consent, access disclosures, and migration of `0644` files. Extend state tests for permission preservation, rejection of missing owner access, and interrupted migration recovery; snapshot the startup warning.
GitOrigin-RevId: 2d9c3663172c3e631a787dc1dc76db95c39e6aa1
Dmitriy Kovalenko