cursor: soak-test long exec tools against unknown server-side exec deadline

The official cursor-agent CLI keeps a 3s per-exec heartbeat and the server blocks in-band waiting for exec results; Cursor's server-side deadline for a single exec (e.g. a 10-minute bash) is unknown. After the exec refusal fix, run a long-tool soak (>5min) on a cursor model and record whether the server times the exec out, to size senpi's timeout mapping. (2026-08-20 audit, dissection /tmp/cursor-agent-dissection.md.)

Read the Cursor CLI dissection at /tmp/cursor-agent-dissection.md and the existing exec-refusal fix. Run a greater-than-five-minute tool against a Cursor model, then record whether the server times out the exec; the result should help size senpi's timeout mapping.

Written by the indexing model from the issue text.