The SummaryCompressor (runtime::summary_compression) was exported but
called nowhere. Lane events emitted a Finished variant with detail: None
even when the agent produced a result string.
Wire compress_summary_text() into the Finished event detail field so that:
- result prose is compressed to ≤1200 chars / 24 lines before storage
- duplicate lines and whitespace noise are removed
- the event detail is machine-readable, not raw prose blob
- None is still emitted when result is empty/None (no regression)
This is the P1.4 wiring item from ROADMAP: 'Wire SummaryCompressor into
the lane event pipeline — exported but called nowhere; LaneEvent stream
never fed through compressor.'
cargo test --workspace: 643 pass (1 pre-existing flaky), fmt clean.
2dfda31b26