v1.36.304

Fixed (tests): probes and e2e cases left their temp folders behind (T-0357). On 2026-10-14 this PC's temp directory held 8,434 leerness-* folders under 332 name prefixes; 5,142 of them came from e2e.js case sandboxes and 1,243 from the memory probes' arena (T-0354 fixed that one). The test runner now removes them: the test process records the folders it makes, and scripts/ci-shard.js removes them after the test ended with exit status 0.

Tests: scripts/temp-cleanup-probe.js has twenty-seven cases (four before) and scripts/ci-shard-probe.js three more (seventeen):