memory: rename recall header to [injected recalled memories] for clearer model parsing

memory search: carry the embedding-skip reason instead of dropping it

fix(memory): say the cost of an embedding profile change out loud

feat(memory): one verdict source for embedding availability

fix: keep the tail of soul and core in summary grounding, not only the head

summary grounding: keep the tail of soul/core, not only the head

feat(memory): one verdict source for embedding availability

fix(runtime): degrade discord search to keyword when embeddings fail

sqlite: share free-page compaction, and write down when to use it

metrics: reclaim free pages after pruning

i think code is clean enough atm