Adds a read-only builtin that returns the curiosity_scan InternalStateEvents
created after a `since` cutoff that are STILL RESIDENT — "what I was chewing on
while you were gone." curiosity_scan is identified by the marker the soul writes
into each ISE's JSON content; heartbeat and other ISEs are excluded.
HARD honesty rail: it reports only ISEs still in the buffer. Anything rotated
out by the 48h engram_prune_telemetry is simply ABSENT — rotated-out = "I don't
remember", never a synthesized/plausible dream. Purely additive, no flag.
The HTTP route (GET /api/dreams?since=) is DEFERRED to cutover per the elc-drift
blocker (regenerating engram/dist diverges with no source change); the builtin
is exercised directly by the pure-C gate.
MEASURED on a copy: seeded 3 curiosity_scan (ancient/1h/now) + 1 heartbeat;
before prune dreams returned exactly the 3 curiosity_scan (heartbeat excluded);
after the 48h prune the ancient one was ABSENT (not confabulated), leaving 2;
the since-filter returned only the post-cutoff event; no returned id was ever
fabricated. ASan+UBSan clean.
will.anderson
77a4bc9326