wip: Speculative Availability#7

Draft

timwu20 wants to merge 11 commits intotim/speculative-availability-basefrom

tim/speculative-availability

Commits on Nov 12, 2025

core info, get backable candidates, hack av-store
timwu20
committed

Commits on Nov 18, 2025

add new av store message type, send message for early fetches
timwu20
committed

Commits on Dec 2, 2025

Commits on Dec 3, 2025

Commits on Dec 4, 2025

add origin metric label to fetched_chunks, assert on said label in ZN test
timwu20
committed
revise NoteBackableCandidate msg to handle HashSet of candidate hashes, add num_validators attribute
timwu20
committed

Commits on Dec 5, 2025