.lore.md must always be staged, never left untracked

Repo convention (byk.github.io, applies generally to lore-managed repos): whenever .lore.md appears as a new/modified file (typically from a background lore migration process), it must be staged and committed alongside other changes in the same commit — never left untracked or stashed. AGENTS.md changes from the same lore migration (e.g. replacing inline knowledge sections with a pointer sentence to .lore.md) should be committed together with it, since both files are lore-managed and travel as a unit.