Drop successful (2xx/3xx) asset and telemetry GETs from the semantic
timeline — these were eating MAX_LINES (80) before any user-behavior
signal could surface. In a 9m32s session we observed only the first
1:18 reached the LLM input because PostHog /collect/* pings filled
the budget. Failures (4xx/5xx) are still emitted as signal.
Filtered prefixes: /collect/, /flags, /array/, /static/, /assets/,
/api/surveys, /css2. Also raise MAX_LINES 80→120.
Add optional { sessionId } to POST /api/insights/reprocess so a single
session can be re-run end-to-end without resetting a whole batch.
16695de6d2