[ ] When the hourly fetch from the first part finds a new parent tip and the mode is tell-me, the forge's owner gets one inbox card: "Your parent forge has N new commits", linking the chain page. Exactly one card per parent tip, never repeated, and none after severing or in take-updates.
[ ] Tests with the two local bare repositories: one card for a new tip, none for the same tip on the next check, and none when severed.
[ ] Run bun x tsc --noEmit and the chain and inbox tests.
Done looks like:
tell-me, the forge's owner gets one inbox card: "Your parent forge has N new commits", linking the chain page. Exactly one card per parent tip, never repeated, and none after severing or intake-updates.bun x tsc --noEmitand the chain and inbox tests.